CN218420215U

CN218420215U - Composite wound dressing

Info

Publication number: CN218420215U
Application number: CN202221191025.0U
Authority: CN
Inventors: 唐海达
Original assignee: Jiaxing Linhua Medical Material Co ltd
Current assignee: Zhejiang Fumao Biotechnology Co.,Ltd.
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2023-02-03
Anticipated expiration: 2032-05-17

Abstract

The utility model discloses a composite wound dressing, which comprises a release layer, a silica gel composite layer, a middle layer and a substrate layer, wherein a cavity is formed between the silica gel composite layer and the substrate layer, the middle layer is arranged in the cavity, the silica gel composite layer is provided with a window, and the size of the window is smaller than that of the middle layer; the silicone gel composite layer sequentially comprises silicone gel, a polyurethane film and polyacrylate glue from top to bottom, the middle layer sequentially comprises a contact layer, a first bonding layer and a moisture absorption layer from top to bottom, and the base material layer sequentially comprises a second bonding layer and a waterproof breathable layer from top to bottom. The utility model discloses a compound wound dressing passes through substrate layer and the laminating of silica gel composite bed, wraps up the intermediate level in the centre, firmly fixes, guarantees that the dressing can not the layering drop, and energy resource consumption is few, and production efficiency is higher, and product imbibition ability obtains bigger promotion. Meanwhile, the dressing blocks water and bacteria, and the clinical operation is simpler and more convenient.

Description

Composite wound dressing

Technical Field

The utility model relates to a medical dressing technical field, concretely relates to compound wound dressing.

Background

The utility model patent of patent publication No. CN 103655046A introduces a wound dressing with three-layer structure and its preparation method, the wound dressing has wound contact layer, middle moisture absorption layer and skin, the wound contact layer is the non-woven fabrics that contains hydrophilic fibre and hydrophobic fibre, middle moisture absorption layer is the non-woven fabrics that contains another group of hydrophilic fibre and hydrophobic fibre, the skin is the non-woven fabrics that contains hydrophobic fibre. The wound contact layer contains hydrophobic fibers, and the hydrophobic fibers are not capable of absorbing moisture, so that the hydrophobic fibers are easy to adhere to wound tissues after contacting the wound for a long time, and secondary injury and pain of the wound are easily caused when the wound dressing is uncovered. The middle moisture absorption layer is made of another group of hydrophilic fiber and hydrophobic fiber; the fiber has high hardness and no elasticity, and causes wound discomfort of patients after being applied for a long time. The outer layer is hydrophobic fiber non-woven fabric, does not have the performance of water and bacteria resistance, and is easy to invade by microorganisms to cause wound infection. And this dressing does not have the self-adhesion function, need use the secondary to have the dressing of stickness to paste fixedly, has increased the quantity of medical consumables, brings the inconvenient operation. The liquid absorption amount of the dressing is between 30 and 50 grams per square meter, and the liquid absorption amount of the wound surface with large liquid seepage amount needs to be improved.

Based on the above circumstances, the utility model provides a compound wound dressing can effectively solve above problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compound wound dressing. The utility model discloses a compound wound dressing convenient to use through substrate layer and the laminating of silica gel composite bed, wraps up the intermediate level in the centre, firmly fixes, guarantees that the dressing can not the layering drop, and energy resource consumption is few, and production efficiency is higher, and product imbibition ability obtains bigger promotion. Meanwhile, the dressing resists water and bacteria, has self-adhesion, good application performance and simpler and more convenient clinical operation.

The utility model discloses a following technical scheme realizes:

a composite wound dressing comprises a release layer, a silicon gel composite layer, a middle layer and a substrate layer, wherein a cavity is formed between the silicon gel composite layer and the substrate layer, the middle layer is arranged in the cavity, a window is formed in the silicon gel composite layer, and the size of the window is smaller than that of the middle layer;

the silicone gel composite layer sequentially comprises silicone gel, a polyurethane film and polyacrylate glue from top to bottom, the middle layer sequentially comprises a contact layer, a first bonding layer and a moisture absorption layer from top to bottom, and the base material layer sequentially comprises a second bonding layer and a waterproof breathable layer from top to bottom.

Preferably, the contact layer is gel fiber non-woven fabric, the moisture absorption layer is polyurethane foam or polyvinyl alcohol foam, the waterproof breathable layer is a polyurethane film or polyurethane elastic non-woven fabric, the first bonding layer is a hot melt adhesive net film or a dot film, and the second bonding layer is pressure-sensitive adhesive.

Preferably, the gel fiber non-woven fabric is made of one or more of alginate fibers, modified cellulose fibers, modified chitosan fibers and polyvinyl alcohol fibers.

Preferably, the grammage of the gel fiber non-woven fabric is 80-180 g/m2, the thickness of the gel fiber non-woven fabric is 1.0-5.0 mm, the grammage of the first bonding layer is 8-50 g/m2, and the thickness of the moisture absorption layer is 2-5 mm.

Preferably, the thickness of the waterproof breathable layer is 10-150 mu m, and the gram weight of the pressure-sensitive adhesive is 10-40 g/m < 2 >.

Preferably, the thickness of the polyurethane film is 10-40 μm, the gram weight of the silicone gel is 30-300 g/m2, and the gram weight of the polyacrylate adhesive is 10-40 g/m2.

Preferably, the shape of the through hole is circular, rhombic or polygonal.

Preferably, the release layer comprises a first release film and a second release film, wherein a bent part is arranged at one end of the first release film close to the middle of the wound dressing, and the second release film partially covers the first bent part of the first release film.

Preferably, the first release film and the second release film are both made of PE or PET.

Preferably, the silicone gel composite layer and the second bonding layer are both provided with through holes.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model discloses a compound wound dressing convenient to use through substrate layer and the laminating of silica gel composite bed, wraps up the intermediate level in the centre, firmly fixes, guarantees that the dressing can not the layering drop, and energy resource consumption is few, and production efficiency is higher, and product imbibition ability obtains bigger promotion. Meanwhile, the dressing resists water and bacteria, has self-adhesion, good application performance and simpler and more convenient clinical operation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the following description of the preferred embodiments of the present invention is given with reference to the accompanying examples, but it should be understood that the drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Example 1:

as shown in fig. 1, the utility model provides a composite wound dressing, including release layer 1, silica gel composite layer, intermediate layer and substrate layer, a cavity is formed between the silica gel composite layer and the substrate layer, the intermediate layer is arranged in the cavity, the silica gel composite layer is provided with a window, and the size of the window is smaller than that of the intermediate layer;

the silicone gel composite layer comprises a silicone gel 2, a polyurethane film 3 and a polyacrylate adhesive 4 from top to bottom in sequence, the middle layer comprises a contact layer 5, a first bonding layer 6 and a moisture absorption layer 7 from top to bottom in sequence, and the base material layer comprises a second bonding layer 8 and a waterproof breathable layer 9 from top to bottom in sequence.

Further, in another embodiment, the silicone gel composite layer and the second adhesive layer 8 are both provided with through holes.

Further, in another embodiment, the contact layer 5 is a gel fiber non-woven fabric, the moisture absorption layer 7 is a polyurethane foam or a polyvinyl alcohol foam, the waterproof breathable layer 9 is a polyurethane film 3 or a polyurethane elastic non-woven fabric, the first adhesive layer 6 is a hot melt adhesive net film or a dot film, and the second adhesive layer 8 is a pressure sensitive adhesive.

The polyurethane foam or polyvinyl alcohol foam is soft and elastic, does not press wounds, and can prevent pressure sores and bedsores; the polyurethane film 3 not only has the functions of water resistance and bacteria resistance, greatly reduces the pollution, infection and inflammation of microorganisms of wounds, but also has extremely high water vapor transmission rate which is more than 2000 g/(24h × m) ² )；

Further, in another embodiment, the gel fiber non-woven fabric is made of one or more of alginate fibers, modified cellulose fibers, modified chitosan fibers and polyvinyl alcohol fibers.

Further, in another embodiment, the gram weight of the gel fiber non-woven fabric is 80-180 g/m ² The thickness is 1.0-5.0 mm, and the gram weight of the first bonding layer 6 is 8-50 g/m ² The thickness of the moisture absorption layer 7 is 2-5 mm.

Further, in another embodiment, the thickness of the waterproof breathable layer 9 is 10-150 μm, and the gram weight of the pressure-sensitive adhesive is 10-40 g/m ² 。

Further, in another embodiment, the thickness of the polyurethane film 3 is 10 to 40 μm, and the gram weight of the silicone gel 2 is 30 to 300g/m ² The gram weight of the polyacrylate adhesive 4 is 10-40 g/m ² 。

Further, in another embodiment, the shape of the through hole is circular, diamond-shaped or polygonal.

Further, in another embodiment, the release layer 1 includes a first release film 15 and a second release film 16, a bending portion 151 is disposed at one end of the first release film 15 near the middle of the wound dressing, and the second release film 16 partially covers the bending portion 151 of the first release film 15.

Due to the structure, the release layer is convenient for a user to tear down.

Further, in another embodiment, the first release film and the second release film are both made of PE or PET.

Compound wound dressing have elasticity, the dressing has the self-adhesion function, does not glue even wound, the patient wears comfortablely. The outer layer has the performance of water and bacteria resistance, thereby preventing wound infection and simplifying nurse operation. The liquid absorption amount of the dressing is more than 40 g/square meter, the dressing can absorb seepage for a long time, and the service life can reach 7 days.

After absorbing moisture or absorbing wound exudate, the peel strength between the contact layer 5 and the moisture absorption layer 7 after absorbing moisture is greater than 0.6N/cm, the bonding strength between the moisture absorption layer 7 and the outer layer is greater than 0.2N/cm, the composite dressing has higher liquid absorption amount than a common composite dressing, the bonding strength between the layers is high, and the composite dressing is not easy to delaminate and fall off.

According to the description and the drawings of the present invention, the composite wound dressing of the present invention can be easily manufactured or used by those skilled in the art, and the positive effects described in the present invention can be produced.

Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of description and simplification of the description, but it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and are not to be construed as limiting the present patent, and it is possible for a person having ordinary skill in the art to understand the specific meaning of the above terms according to the specific circumstances in conjunction with the drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass both fixed and removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.

Claims

1. A composite wound dressing characterized by: the solar cell comprises a release layer, a silicon gel composite layer, an intermediate layer and a substrate layer, wherein a cavity is formed between the silicon gel composite layer and the substrate layer, the intermediate layer is arranged in the cavity, the silicon gel composite layer is provided with a window, and the size of the window is smaller than that of the intermediate layer;

the silicone gel composite bed includes silicone gel, polyurethane film and polyacrylate glue from top to bottom in proper order, the intermediate level includes contact layer, first tie coat and moisture absorption layer from top to bottom in proper order, the substrate layer includes second tie coat and waterproof ventilative layer from top to bottom in proper order.

2. Composite wound dressing according to claim 1, characterized in that: the contact layer is gel fiber non-woven fabric, the moisture absorption layer is polyurethane foam or polyvinyl alcohol foam, the waterproof breathable layer is a polyurethane film or polyurethane elastic non-woven fabric, the first bonding layer is a hot melt adhesive net film or a dot film, and the second bonding layer is pressure-sensitive adhesive.

3. Composite wound dressing according to claim 2, characterized in that: the gram weight of the gel fiber non-woven fabric is 80-180 g/m ² The thickness is 1.0-5.0 mm, and the gram weight of the first bonding layer is 8-50 g/m ² The thickness of the moisture absorption layer is 2-5 mm.

4. Composite wound dressing according to claim 2, characterized in that: the thickness of the waterproof breathable layer is 10-150 mu m, and the gram weight of the pressure-sensitive adhesive is 10-40 g/m ² 。

5. Composite wound dressing according to claim 1, characterized in that: the thickness of the polyurethane film is 10-40 mu m, and the gram weight of the silicon gel is 30-300 g/m ² The gram weight of the polyacrylate adhesive is 10-40 g/m ² 。

6. Composite wound dressing according to claim 1, characterized in that: from the type layer including first from type membrane and second from the type membrane, first from the type membrane be close to wound dressing middle one end and be equipped with the kink, the second from type membrane part cover on first kink from the type membrane.

7. Composite wound dressing according to claim 6, characterized in that: the first release film and the second release film are both made of PE or PET.

8. Composite wound dressing according to claim 1, characterized in that: through holes are formed in the silicon gel composite layer and the second bonding layer.

9. Composite wound dressing according to claim 8, characterized in that: the shape of the through hole is round, diamond or polygon.