CN216985838U - Silica gel foam dressing - Google Patents
Silica gel foam dressing Download PDFInfo
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- CN216985838U CN216985838U CN202220011208.3U CN202220011208U CN216985838U CN 216985838 U CN216985838 U CN 216985838U CN 202220011208 U CN202220011208 U CN 202220011208U CN 216985838 U CN216985838 U CN 216985838U
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Abstract
The utility model discloses a silicone gel foam dressing which comprises a gluing carrier layer, a liquid absorption layer and a wound contact layer, wherein the liquid absorption layer is arranged between the gluing carrier layer and the wound contact layer, the wound contact layer is provided with a porous silicone gel layer, and vent holes with different apertures are formed in the wound contact layer. The liquid absorption layer mainly comprises a polyurethane cotton layer and a sodium polyacrylate layer, achieves ultrahigh absorption capacity on wound seepage, maintains a wound moist environment and is beneficial to rapid wound healing. The contact layer is provided with the vent holes with different sizes, wherein the large-size holes ensure the capability and the air permeability of the liquid absorption layer for absorbing the wound exudate; the small-size hole increases the nature of applying, prevents to easily rise in the use and stick up the limit, has the difficulty to improve user's use travelling comfort.
Description
Technical Field
The utility model relates to the technical field of medical dressings, in particular to a silica gel foam dressing.
Background
The medical dressing is used for treating common wounds, burns, bedsores, ulcers and the like. In use, wound exudate is absorbed by the wound contact layer of the dressing. The traditional dressing gauze and wound exudate form dry scab, the water loss is obvious, and the wound moistening environment cannot be maintained. Meanwhile, the traditional dressing gauze is often adhered with wound exudate, so that mechanical loss is easily caused when the dressing gauze is removed, the natural recovery of the wound is not facilitated, and the pain of a user is difficult to endure. In recent decades, with the proposal of the theory of wet healing and the development of biomaterials, new medical dressings have been emerging. In modern new wound dressings, the wound contact layer may comprise a hydrogel or a silicone gel. The novel dressing can provide a moist healing environment, protect the wound surface, relieve the pain of the wound and absorb a large amount of seepage.
However, since the silicone gel layer is used as the wound contact layer, it is necessary to provide a vent hole in the silicone gel layer because of the water impermeability of the silicone gel itself. In the existing processing technology, the contact layer is mostly provided with vent holes with the same size. This in turn reduces the application of the contact layer, which makes the dressing easy to raise the edge during use, difficult to adhere and difficult to provide comfortable protection.
Therefore, it is required to provide a novel silicone gel foam dressing which can highly absorb exudate from a wound surface and has high application performance.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the problems, the utility model provides a silicone gel foam dressing which combines the advantages of silicone gel, sodium polyacrylate and polyurethane foam and can improve the application performance of the silicone gel dressing.
In order to achieve the purpose, the utility model provides a silicone gel foam dressing which is characterized by comprising a gluing carrier layer, a liquid absorption layer and a wound contact layer, wherein the liquid absorption layer is arranged between the gluing carrier layer and the wound contact layer, the wound contact layer is provided with a porous silicone gel layer, and vent holes with different apertures are arranged on the wound contact layer.
Preferably, the liquid absorption layer comprises a first liquid absorption layer, a polyurethane cotton layer and a sodium polyacrylate layer which are arranged in sequence from the far direction to the near direction of the wound contact layer.
Preferably, the liquid absorbent layer comprises a first liquid absorbent layer, a sodium polyacrylate layer and a polyurethane foam layer which are arranged in sequence from the far direction to the near direction of the wound contact layer.
Preferably, the liquid-absorbing layer includes a sodium polyacrylate layer and a polyurethane cotton layer in any order.
Preferably, the liquid absorbing layer is a sodium polyacrylate layer or a polyurethane cotton layer.
Preferably, the first liquid absorption layer is a polyurethane cotton layer, a knitted fabric layer or a nonwoven fabric layer.
Preferably, the wound contact layer has a lateral dimension larger than that of the liquid absorbent layer, inner layers of the liquid absorbent layer have lateral dimensions gradually larger in a direction from the far side to the near side from the wound contact layer, and edges of the wound contact layer and the liquid absorbent layer as a whole have regular lateral dimensions gradually larger in a direction from the far side to the near side from the wound contact layer.
Preferably, the wound contact layer has a lateral dimension greater than that of the liquid absorbent layer, and the edges of the wound contact layer and the liquid absorbent layer as a whole have regularly increasing lateral dimensions in directions from the distal side to the proximal side of the wound contact layer.
Preferably, the size difference between the inner layers of the liquid-absorbent layer is 0 to 30 mm.
Preferably, the rubberized carrier layer comprises a polyurethane film carrier layer.
Preferably, the adhesive carrier layer further comprises a pressure sensitive adhesive layer coated between the polyurethane film carrier layer and the liquid absorbing layer.
Preferably, an adhesive layer is provided between the first liquid-absorbing layer and the sodium polyacrylate layer.
Preferably, the wound contact layer comprises a wound contact area and a dressing edge area.
Preferably, the wound contact layer further comprises a porous pressure-sensitive adhesive layer and a porous polyurethane film layer, the porous pressure-sensitive adhesive layer is coated on one side, close to the liquid absorption layer, of the porous polyurethane film layer, and the porous silica gel layer is coated on the other side of the porous polyurethane film layer.
Preferably, the wound contact layer further comprises a porous pressure-sensitive adhesive layer and a porous polyurethane film layer, the porous pressure-sensitive adhesive layer is coated on one side, close to the liquid absorption layer, of the porous polyurethane film layer, and the porous silica gel layer is coated on the other side of the porous polyurethane film layer.
Preferably, the porous pressure-sensitive adhesive layer, the porous polyurethane film layer and the porous silica gel layer are respectively provided with vent holes, and the vent holes in the porous pressure-sensitive adhesive layer, the porous polyurethane film layer and the porous silica gel layer are communicated with each other.
Preferably, the vent holes comprise large air holes and small air holes, the large air holes being arranged in the wound contact area of the wound contact layer and the small air holes being arranged in the dressing edge area of the wound contact layer.
Preferably, the pore diameter of the large pores is between 0.5 and 5.0mm, and the pore diameter of the small pores is between 0.1 and 2.0 mm.
Preferably, the wound contact layer comprises a wound contact area and a dressing edge area.
Preferably, the wound contact area corresponds to the area covered by the layer of the inner layers of the liquid absorbent layer closest to the wound contact layer.
Preferably, a release film layer is arranged on the outer side of the porous silica gel layer.
Preferably, the pressure-sensitive adhesive layer is provided with an acrylic adhesive structure.
Preferably, the acrylic glue structure is acrylic glue.
Compared with the prior art, the utility model has the beneficial effects that:
the wound contact layer is provided with the vent holes with different sizes, and the wound contact layer is provided with the vent holes with relatively larger sizes, so that the capability and the air permeability of the liquid absorption layer for absorbing wound exudate are ensured; set up the relatively less air vent of size in the edge region that applies in order to increase the application, prevent easily rise in the use and stick up the limit, the adhesion has the difficulty to improve user's use travelling comfort.
Secondly, a high buffer is added between the gluing carrier layer and the pasting contact layer, so that the pasting property of the dressing in use is further improved.
And thirdly, the liquid absorption layer comprising the polyurethane cotton layer and/or the sodium polyacrylate layer realizes ultrahigh absorption capacity to the wound seepage, maintains the moist environment of the wound and is beneficial to the rapid healing of the wound.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
The following figures are provided as examples only and may in fact be of different sizes and shapes as required by the application.
Fig. 1 is a schematic top view of a silicone gel foam dressing according to one or both embodiments of the present invention.
Fig. 2 is a schematic cross-sectional view of a silicone gel foam dressing in an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structure of a silicone gel foam dressing in two embodiments of the present invention.
Fig. 4 is a schematic structural diagram of a silicone gel foam dressing in three embodiments of the present invention.
Description of reference numerals:
1-a polyurethane film carrier layer; 2-a pressure sensitive adhesive layer; 3-a first liquid absorbent layer; 4-an adhesive layer; 5-a sodium polyacrylate layer; 6-polyurethane cotton layer; 7-porous pressure sensitive adhesive layer; 8-a porous polyurethane film layer; 9-a layer of porous silicone gel; 10-a release film layer; 11-big air hole; 12-small pores.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 4, the present invention describes a silicone gel foam dressing comprising a rubberized carrier layer, a liquid absorbing layer and a wound contact layer, wherein the liquid absorbing layer is arranged between the rubberized carrier layer and the wound contact layer, the wound contact layer has a porous silicone gel layer 9, and the wound contact layer is provided with vent holes with different pore sizes.
Through the arrangement of the structure, the liquid absorption layer can be ensured to have better liquid absorption capacity and air permeability through the vent holes, and the dressing performance of the wound contact layer can be increased at the small aperture. And the wound contact layer is pasted on the skin by adopting the porous silica gel layer, is mild and non-irritant, can be pasted repeatedly, can inhibit scar spasm and prevent hyperplastic scars.
In particular implementations, the liquid-absorbent layer may take a variety of forms to compromise absorbency and utility according to different wound types.
In one embodiment, the liquid absorbent layer includes a first liquid absorbent layer, a polyurethane foam layer, and a sodium polyacrylate layer. By arranging the polyurethane cotton layer and the sodium polyacrylate layer, the wound dressing has ultrahigh absorption capacity on wound seepage, realizes very good liquid absorption capacity, keeps a moist environment of a wound and is beneficial to rapid wound healing.
Preferably, the liquid absorption layer comprises a first liquid absorption layer 3, a sodium polyacrylate layer 5 and a polyurethane foam layer 6 which are arranged from top to bottom. As shown in fig. 2, in a sectional view with the carrier layer on top, the first liquid-absorbing layer 3 is located on top of the sodium polyacrylate layer 5, and then the sodium polyacrylate layer 5 is fitted on top of the polyurethane cotton layer 6, the three layers together forming the liquid-absorbing layer.
Preferably, the first liquid-absorbing layer may be a polyurethane foam layer, a knitted fabric or a nonwoven fabric layer, and the polyurethane foam layer 6 adjacent to the wound contact layer has a size slightly larger than that of the first liquid-absorbing layer 3. Preferably, the difference in the dimension in width between the polyurethane foam layer 6 and the first liquid absorbent layer 3 is between 0 and 30 mm. The sodium polyacrylate layer 5 may be substantially the same size as the first liquid absorbent layer 3 and/or substantially the same size as the sodium polyacrylate layer 5. Typically, the size of the wound contact layer is maximized to attach the dressing to the skin such that the width of the liquid absorbent layer to the wound contact layer increases from layer to layer, forming a step in the longitudinal direction. The design aims to increase a high buffer between the carrier layer and the contact pasting layer, so that the edge of the dressing is not easy to tilt when the dressing is used, and a more comfortable technical effect is achieved.
In a second embodiment, the liquid-absorbing layer comprises a polyurethane foam layer and a sodium polyacrylate layer. By arranging the sodium polyacrylate layer, the wound dressing has ultrahigh absorption capacity on wound exudate, realizes very good liquid absorption capacity, keeps a moist environment of a wound and is beneficial to rapid wound healing.
Preferably, there may be a size difference (a, b) between the polyurethane foam layer 5 and the specific sodium polyacrylate layer 6, or the same size (c, d) is maintained.
Preferably, the dimensional difference in width between the polyurethane foam layer 5 and the layer 6 of the comparative sodium polyacrylate is between 0 and 30 mm.
The adhesive layer 4 may or may not be arranged between the polyurethane foam layer 5 and the sodium polyacrylate layer 6 according to the actual process production requirements. The polyurethane sponge layer 5 and the sodium polyacrylate layer 6 can be closely adhered together.
In three embodiments, the liquid-absorbing layer comprises a polyurethane foam layer 6 or a sodium polyacrylate layer 5. The liquid absorption performance of the polyurethane foam or the sodium polyacrylate layer meets the absorption requirement of the common wound seepage, and the softness and the comfort of the dressing are also considered.
In an embodiment, the adhesive carrier layer comprises a polyurethane film carrier layer 1. Among them, the polyurethane film (PU film) has excellent elasticity, water resistance, and air permeability, and has antibacterial properties.
In an embodiment, the adhesive carrier layer further comprises a pressure sensitive adhesive layer 2, the pressure sensitive adhesive layer 2 being coated between the polyurethane film carrier layer 1 and the liquid absorbing layer. The liquid-absorbing layer is adhesively secured to the carrier layer by means of the pressure-sensitive adhesive layer 2. The pressure-sensitive adhesive is any one of acrylic pressure-sensitive adhesive, polyurethane pressure-sensitive adhesive or medical polyisobutylene pressure-sensitive adhesive.
Preferably, the pressure sensitive adhesive layer is mainly made of acrylic glue.
In an embodiment, an adhesive layer 4 is provided between the first liquid-absorbing layer 3 and the sodium polyacrylate layer 5. The adhesive layer 4 may or may not be present between the first liquid-absorbing layer 3 and the sodium polyacrylate layer 5, depending on the actual process requirements. The first liquid-absorbing layer 3 and the sodium polyacrylate layer 5 may be bonded together in close contact.
In one embodiment, the wound contact layer further comprises a porous pressure sensitive adhesive layer 7 and a porous polyurethane film layer 8, wherein the porous pressure sensitive adhesive layer 7 is coated on one side of the porous polyurethane film layer 8 close to the liquid absorption layer, and the porous silica gel layer 9 is coated on the other side of the porous polyurethane film layer 8. The liquid absorbing layer is arranged between the polyurethane film carrier layer 1 coated with the pressure sensitive adhesive layer 2 and the porous polyurethane film layer 8 coated with the porous pressure sensitive adhesive layer 7 on one side. Through poroid pressure sensitive adhesive layer 7, the liquid absorbing layer is in the same place with the wound contact layer bonding, and poroid polyurethane film layer 8 is attached on user's wound through poroid silica gel layer 9, has good travelling comfort.
Preferably, the vent holes on the porous pressure sensitive adhesive layer 7, the porous polyurethane film layer 8 and the porous silica gel layer 9 are communicated with each other. Corresponding to the positions of the vent holes on the porous silica gel layer 9, the porous pressure-sensitive adhesive layer 7 and the porous polyurethane film layer 8 are both provided with vent holes. Thus, the whole wound contact layer forms a through vent hole which is communicated up and down, and has very strong air permeability. The liquid absorption layer can fully absorb exuded mucus of the wound through the vent holes which are vertically communicated with the wound contact layer.
Preferably, the vent holes comprise large air holes 11 and small air holes 12, the large air holes 11 are arranged at the wound contact area of the wound contact layer, and the small air holes 12 are arranged at the dressing edge area of the wound contact layer. Correspondingly, the porous pressure-sensitive adhesive layer 7, the porous polyurethane film layer 8 and the porous silica gel layer 9 are correspondingly provided with big air holes and small air holes in the wound contact layer. Through the arrangement, the large air holes 11 in the wound contact area can ensure that the liquid absorption layer can quickly absorb wound seepage liquid, and the small air holes in the pasting edge area outside the wound contact area can prevent the edge of the dressing from tilting, so that both the air permeability and the pasting property of the wound dressing are taken into consideration.
Preferably, the pore diameter of the large pores 11 is between 0.5 and 5.0mm, and the pore diameter of the small pores 12 is between 0.1 and 2.0 mm.
Preferably, the large air holes 11 correspond to the area covered by the polyurethane foam layer 6. Thus, the large air holes 11 are uniformly arranged in the corresponding area of the polyurethane foam layer 6 and are connected with the second polyurethane foam layer 6, so that the liquid absorption capacity is ensured to the maximum extent, and the air permeability is very strong.
In one embodiment, a release film 10 is disposed on the outer side of the porous silica gel layer 9. The release film 10 is attached to the silicone gel layer 9, and can protect the dressing when not in use, thereby preventing the dressing from being stuck with impurities such as dust. When in use, the release film is needed to be torn off, and the dressing is covered and stuck on the skin of the wound.
As shown in fig. 2, in one embodiment, the silicone gel foam dressing provided by the present invention may specifically include a polyurethane film carrier layer 1, a pressure sensitive adhesive layer 2, a first liquid absorption layer 3, an adhesive layer 4, a sodium polyacrylate layer 5, a polyurethane foam layer 6, a porous pressure sensitive adhesive layer 7, a porous polyurethane film layer 8, a porous silicone gel layer 9 and a release film layer 10, which are disposed from top to bottom. Through this silica gel foam dressing, can enough realize the ability of quick absorption sepage, very strong gas permeability, improve the subsides nature of dressing again, further promoted user's use experience.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein, and all such modifications, equivalents, improvements and equivalents as fall within the spirit and scope of the present invention are intended to be included therein.
Claims (24)
1. The silicone gel foam dressing is characterized by comprising an adhesive carrier layer, a liquid absorption layer and a wound contact layer, wherein the liquid absorption layer is arranged between the adhesive carrier layer and the wound contact layer, the wound contact layer is provided with a porous silicone gel layer, and vent holes with different pore sizes are formed in the wound contact layer.
2. The silicone gel foam dressing of claim 1, wherein the liquid absorbent layer comprises a first liquid absorbent layer, a polyurethane foam layer and a sodium polyacrylate layer disposed in this order from the distal direction to the proximal direction from the wound contact layer.
3. The silicone gel foam dressing of claim 1, wherein the liquid absorbent layer comprises a first liquid absorbent layer, a sodium polyacrylate layer and a polyurethane foam layer arranged in this order from the far and near directions from the wound contact layer.
4. The silicone gel foam dressing of claim 1, wherein the liquid absorbent layer comprises a sodium polyacrylate layer and a polyurethane foam layer in any order.
5. The silicone gel foam dressing of claim 1, wherein the liquid absorbent layer is a sodium polyacrylate layer or a polyurethane foam layer.
6. The silicone gel foam dressing of claim 2 or 3, wherein the first liquid absorbing layer is a polyurethane foam layer, a knitted fabric layer, or a nonwoven fabric layer.
7. The silicone gel foam dressing of any one of claims 2 to 4, wherein the wound contact layer has a lateral dimension greater than a lateral dimension of the liquid absorbent layer, inner layers of the liquid absorbent layer have lateral dimensions that increase progressively from the distal direction to the proximal direction of the wound contact layer, and edges of the wound contact layer and the liquid absorbent layer as a whole have regular lateral dimensions that increase progressively from the distal direction to the proximal direction of the wound contact layer.
8. The silicone gel foam dressing of claim 5, wherein the wound contact layer has a lateral dimension greater than a lateral dimension of the liquid absorbent layer, and wherein the edges of the wound contact layer and the liquid absorbent layer as a whole have regularly increasing lateral dimensions in directions from distal to proximal of the wound contact layer.
9. The silicone gel foam dressing of claim 7, wherein the size difference between the inner layers of the liquid absorbent layer is 0-30 mm.
10. The silicone gel foam dressing of claim 1, wherein said rubberized carrier layer comprises a polyurethane film carrier layer.
11. The silicone gel foam dressing of claim 10, wherein said adhesive carrier layer further comprises a pressure sensitive adhesive layer, said pressure sensitive adhesive layer being coated between said polyurethane film carrier layer and said liquid absorbent layer.
12. The silicone gel foam dressing of claim 2 or 3, wherein an adhesive layer is disposed between the first liquid absorbent layer and the sodium polyacrylate layer.
13. The silicone gel foam dressing of claim 1, wherein the wound contact layer comprises a wound contact region and a dressing border region.
14. The silicone gel foam dressing of claim 1, wherein the wound contact layer further comprises a porous pressure sensitive adhesive layer and a porous polyurethane film layer, wherein the porous pressure sensitive adhesive layer is coated on one side of the porous polyurethane film layer adjacent to the liquid absorbing layer, and the porous silicone gel layer is coated on the other side of the porous polyurethane film layer.
15. The silicone gel foam dressing of claim 13, wherein the wound contact layer further comprises a porous pressure sensitive adhesive layer and a porous polyurethane film layer, wherein the porous pressure sensitive adhesive layer is coated on one side of the porous polyurethane film layer adjacent to the liquid absorbing layer, and the porous silicone gel layer is coated on the other side of the porous polyurethane film layer.
16. The silicone gel foam dressing of claim 14, wherein the porous pressure sensitive adhesive layer, the porous polyurethane film layer and the porous silicone gel layer are each provided with a vent hole, and the vent holes in the porous pressure sensitive adhesive layer, the porous polyurethane film layer and the porous silicone gel layer are communicated with each other.
17. The silicone gel foam dressing of claim 15, wherein the porous pressure sensitive adhesive layer, the porous polyurethane film layer and the porous silicone gel layer are each provided with a vent hole, and the vent holes in the porous pressure sensitive adhesive layer, the porous polyurethane film layer and the porous silicone gel layer are communicated with each other.
18. The silicone gel foam dressing of claim 17, wherein said vent holes comprise large air holes disposed in said wound contact region of said wound contact layer and small air holes disposed in said dressing border region of said wound contact layer.
19. The silicone gel foam dressing of claim 18, wherein the pore size of the large pores is between 0.5 mm and 5.0mm, and the pore size of the small pores is between 0.1 mm and 2.0 mm.
20. The silicone gel foam dressing of any one of claims 2-5, wherein said wound contact layer comprises a wound contact area and a dressing edge area.
21. The silicone gel foam dressing of claim 20, wherein said wound contact area corresponds to an area covered by a layer of the inner layers of said liquid absorbent layer that is closest to said wound contact layer.
22. The silicone gel foam dressing of claim 1, wherein a release film layer is disposed on the outer side of the porous silicone gel layer.
23. The silicone gel foam dressing of claim 11, wherein the pressure sensitive adhesive layer is provided with an acrylic adhesive structure.
24. The silicone gel foam dressing of claim 23, wherein said acrylic structure is acrylic glue.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220011208.3U CN216985838U (en) | 2022-01-04 | 2022-01-04 | Silica gel foam dressing |
| PCT/US2023/010117 WO2023133142A1 (en) | 2022-01-04 | 2023-01-04 | Silica gel foam dressing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220011208.3U CN216985838U (en) | 2022-01-04 | 2022-01-04 | Silica gel foam dressing |
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| Publication Number | Publication Date |
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| CN216985838U true CN216985838U (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220011208.3U Active CN216985838U (en) | 2022-01-04 | 2022-01-04 | Silica gel foam dressing |
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| CN (1) | CN216985838U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114870062A (en) * | 2022-05-17 | 2022-08-09 | 嘉兴林华医用材料有限公司 | Composite wound dressing and preparation process thereof |
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2022
- 2022-01-04 CN CN202220011208.3U patent/CN216985838U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114870062A (en) * | 2022-05-17 | 2022-08-09 | 嘉兴林华医用材料有限公司 | Composite wound dressing and preparation process thereof |
| CN114870062B (en) * | 2022-05-17 | 2023-09-19 | 浙江敷茂生物科技有限公司 | Composite wound dressing and preparation process thereof |
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