CN114712088A

CN114712088A - Carboxymethyl cellulose wound dressing

Info

Publication number: CN114712088A
Application number: CN202210347301.6A
Authority: CN
Inventors: 陈连节; 黄小培
Original assignee: Zhejiang Longteng Medical New Material Co ltd
Current assignee: Zhejiang Longteng Medical New Material Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-07-08
Anticipated expiration: 2042-04-01
Also published as: CN114712088B

Abstract

The invention provides a carboxymethyl cellulose wound dressing which comprises a dressing body, wherein the dressing body at least comprises a release layer, a wound contact layer, an adhesive layer and a base material; the release layer is overlapped and covered on the outer side of the adhesive layer in a crossed manner and extends to cover the outer side of the wound contact layer, so that the anti-pollution effect is achieved; the inner side of the wound contact layer is bonded with the inner side of the base material through the adhesive layer. The wound contact layer comprises a hydrophilic layer and a hydrophobic layer, the hydrophilic layer is positioned on the outer side of the wound contact layer, and the hydrophobic layer is positioned on the inner side of the wound contact layer; the hydrophobic layer is bonded with the outer side of the adhesive layer. Through hydrophilic layer fibre and the fibrous interlude each other of hydrophobic layer, after hydrophilic layer imbibition formation gel, the hydrophobic layer is because capillary phenomenon, and the gel that forms hydrophilic layer absorbs, and hydrophilic layer combines with the hydrophobic layer to form one deck formula structure, makes hydrophilic layer imbibition back formation gel also be difficult for droing increase of service life.

Description

Carboxymethyl cellulose wound dressing

Technical Field

The invention belongs to the field of wound dressing, and particularly relates to carboxymethyl cellulose wound dressing.

Background

In wound care, the wound surface is placed in a closed and moist environment, which is beneficial to the accelerated healing of the wound surface. The wound dressing comprises powder dressing, gel dressing, hydrocolloid dressing, fiber dressing and the like, wherein the most applied hydrocolloid dressing comprises carboxymethyl cellulose as a basic component, has the characteristic of absorbing wound exudate to form gel, and can play a role in keeping proper temperature and humidity of the wound, supporting the wound and accelerating the healing of the wound. The carboxymethyl cellulose as the dressing can absorb water into the fiber when contacting with water, can be well maintained when being pressed, and can be conveniently applied to and removed from a wound; the liquid medicine is directly and vertically absorbed on the dressing, and can not spread along the fabric to wet the skin around the wound. The carboxymethyl cellulose has the characteristic of forming colloid after moisture absorption, has high moisture absorption and moisture retention, is nontoxic and degradable, and has good biocompatibility.

The patent No. CN201210566478.1 entitled carboxymethyl cellulose-containing medical dressing with high strength and high water absorption and preparation method thereof provides a carboxymethyl cellulose medical dressing, which is prepared by preparing carboxymethyl cellulose into various absorption materials and further preparing medical dressings and has the characteristics of high strength, high liquid absorption and the like.

The wound dressing commonly seen in the market consists of a release layer, a wound contact layer, a base material layer and an adhesive. The release layer has the functions of protecting the dressing and the adhesive, when in use, the release layer is removed from the adhesive, and the adhesive has certain viscosity and can play a role in fixing; the wound contact layer is directly contacted with the wound surface when in use, and plays a role in protecting and absorbing exudates; the substrate has a certain fixing function.

The wound contact layer material is made of carboxymethyl cellulose fiber, if the carboxymethyl cellulose fiber is directly attached to the adhesive, when the adhesive is used, after the carboxymethyl cellulose fiber absorbs exudate, the carboxymethyl cellulose fiber and water in the exudate form gel, so that the risk that the wound contact layer falls off from the adhesive is easily generated, and the use is influenced.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the carboxymethyl cellulose wound dressing, the hydrophobic fiber is used as a transition material, and after the carboxymethyl cellulose fiber and water form gel, the gel can be absorbed by the capillary phenomenon of the hydrophobic fiber, so that the risk of dropping the carboxymethyl cellulose fiber from an adhesive is avoided, and the service life is prolonged.

In order to solve the technical problems, the invention adopts the following technical scheme:

a carboxymethyl cellulose wound dressing comprises a dressing body, wherein the dressing body at least comprises a release layer, a wound contact layer, an adhesive layer and a base material;

the release layer, the wound contact layer, the adhesive layer and the base material are sequentially laminated;

the release layer is 2 pages, is covered on the outer side of the adhesive layer in a crossed and overlapped mode and extends to cover the outer side of the wound contact layer, and has an anti-pollution effect; the inner side of the wound contact layer is bonded to the inner side of the base material by the adhesive layer.

Preferably, the wound contact layer, the adhesive layer and the base material are compounded by a needle punching hot pressing process.

Preferably, the release layer is any one of paper, PE, PET, OPP, PC, PS, PMMA, BOPP, a monosilicon release film and a Teflon release film.

Preferably, the wound contact layer comprises a hydrophilic layer and a hydrophobic layer, the hydrophilic layer is positioned on the outer side of the wound contact layer, and the hydrophobic layer is positioned on the inner side of the wound contact layer; the hydrophobic layer is bonded with the outer side of the adhesive layer.

Preferably, hydrophilic layer and hydrophobic layer are fibrous, and the complex mode is hydrophilic layer fibre and hydrophobic layer fibrous interlude each other, makes hydrophilic layer imbibition back produce the gel also be difficult for droing increase of service life.

After the hydrophilic layer absorbs liquid to generate gel, the hydrophobic layer absorbs the gel formed by the hydrophilic layer due to capillary phenomenon, and the hydrophilic layer and the hydrophobic layer are combined to form a layer type structure.

Preferably, the hydrophilic layer fiber is carboxymethyl cellulose fiber and has strong liquid absorption capacity.

Preferably, the hydrophobic layer fiber is one or more of terylene, chinlon, spandex, polypropylene fiber, polyvinyl chloride fiber and acrylic fiber.

Preferably, the adhesive layer is one or more of white latex, butyl rubber, epoxy glue, polyurethane glue, acrylate glue and polyvinyl acetate glue, so that the hydrophobic layer is tightly connected with the base material and is adhered to the skin to play a role in fixing the dressing.

Preferably, the substrate is a nonwoven fabric or a polyurethane film.

Due to the adoption of the technical scheme, the invention achieves the technical effects that:

1. according to the carboxymethyl cellulose wound dressing prepared by the invention, the hydrophobic fiber is used as a transition material, and the carboxymethyl cellulose fiber has strong liquid absorption property and is easy to fall off from an adhesive layer after forming gel with water; the gel can be absorbed by the capillary phenomenon of the hydrophobic fiber, so that the risk of dropping the carboxymethyl cellulose fiber from the adhesive is avoided, and the service life is prolonged.

2. The hydrophilic layer fiber adopts carboxymethyl cellulose fiber, and has strong liquid absorption capacity.

3. The adhesive layer is one or more of white latex, butyl rubber, epoxy glue, polyurethane glue, acrylate glue and polyvinyl acetate glue, so that the hydrophobic layer is tightly connected with the base material and is adhered to the skin to play a role in fixing the dressing.

4. Hydrophilic layer fibre and the fibrous interlude each other of hydrophobic layer for hydrophilic layer fibre, after hydrophilic layer imbibition formation gel, the hydrophobic layer is because capillary phenomenon, and the gel that will hydrophilic layer formed absorbs, and hydrophilic layer combines with the hydrophobic layer to form one deck formula structure, and stability is stronger.

Drawings

FIG. 1 is a schematic diagram of a wound dressing according to the present invention;

fig. 2 is a structural cross-sectional view of a wound dressing of the present invention.

The meaning of the reference symbols in the figures is: 1. a release layer; 2. a hydrophilic layer; 3. a hydrophobic layer; 4. an adhesive layer; 5. a substrate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-2, the present invention is further described by the following examples:

EXAMPLE 1A carboxymethyl cellulose wound dressing

A carboxymethyl cellulose wound dressing comprises a dressing body, wherein the dressing body at least comprises a release layer 1, a wound contact layer, an adhesive layer 4 and a substrate 5; the wound dressing is characterized in that the wound dressing is formed by sequentially laminating a release layer 1, a wound contact layer, an adhesive layer 4 and a base material 5; the release layer 1 is 2 pages, is covered on the outer side of the adhesive layer 4 in a crossed and overlapped mode and extends to cover the outer side of the wound contact layer, and has an anti-pollution effect; the inner side of the wound contact layer is bonded to the inner side of the base material 5 by the adhesive layer 4.

The wound contact layer, the adhesive layer 4 and the base material 5 are compounded by adopting a needling hot-pressing process.

The wound contact layer comprises a hydrophilic layer 2 and a hydrophobic layer 3, the hydrophilic layer 2 is positioned on the outer side of the wound contact layer, and the hydrophobic layer 3 is positioned on the inner side of the wound contact layer; the hydrophobic layer 3 is bonded to the outer side of the adhesive layer 4.

Hydrophilic layer 2 and hydrophobic layer 3 are fibrous, and the complex mode is hydrophilic layer fibre and hydrophobic layer fibrous interlude each other, makes hydrophilic layer 2 imbibition back formation gel also be difficult for droing increase of service life.

After the hydrophilic layer 2 absorbs liquid to generate gel, the hydrophobic layer 3 absorbs the gel formed by the hydrophilic layer 2 due to capillary phenomenon, and the hydrophilic layer 2 and the hydrophobic layer 3 are combined to form a layer-type structure.

The release layer 1 is a single-silicon release film; the hydrophilic layer fiber is carboxymethyl cellulose fiber and has strong liquid absorption capacity; the hydrophobic layer fiber is terylene; the adhesive layer 4 is white latex, so that the hydrophobic layer 3 is tightly connected with the base material 5 and is adhered to the skin to play a role in fixing the dressing; the base material 5 is a non-woven fabric.

EXAMPLE 2A carboxymethyl cellulose wound dressing

The release layer 1 is PE; the hydrophilic layer fiber is carboxymethyl cellulose fiber and has strong liquid absorption capacity; the hydrophobic layer fiber is chinlon; the adhesive layer 4 is epoxy adhesive, so that the hydrophobic layer 3 is tightly connected with the base material 5 and is adhered to the skin to play a role in fixing the dressing; the substrate 5 is a polyurethane film.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The carboxymethyl cellulose wound dressing comprises a dressing body, and is characterized in that the dressing body at least comprises a release layer (1), a wound contact layer, an adhesive layer (4) and a base material (5);

the wound dressing is characterized in that the wound dressing is formed by sequentially laminating a release layer (1), a wound contact layer, an adhesive layer (4) and a base material (5);

the release layer (1) is 2 pages, is covered on the outer side of the adhesive layer (4) in a cross overlapping manner and extends to cover the outer side of the wound contact layer; the inner side of the wound contact layer is bonded with the inner side of the base material (5) through the adhesive layer (4);

the wound contact layer comprises a hydrophilic layer (2) and a hydrophobic layer (3), the hydrophilic layer (2) is positioned on the outer side of the wound contact layer, and the hydrophobic layer (3) is positioned on the inner side of the wound contact layer; the hydrophobic layer (3) is bonded with the outer side of the adhesive layer (4).

2. A carboxymethyl cellulose wound dressing according to claim 1, characterized in that the wound contact layer, the adhesive layer (4) and the substrate (5) are compounded by a needle punching hot pressing process.

3. A carboxymethyl cellulose wound dressing according to claim 1, characterized in that the release layer (1) is any one of paper, PE, PET, OPP, PC, PS, PMMA, BOPP, mono-silicon release film and teflon release film.

4. Carboxymethyl cellulose wound dressing according to claim 1, characterized in that the hydrophilic layer (2) and the hydrophobic layer (3) are both fibrous, and the complexing means is the interpenetration of hydrophilic layer fibers and hydrophobic layer fibers.

5. A carboxymethyl cellulose wound dressing according to claim 4, wherein the hydrophilic layer fibres are carboxymethyl cellulose fibres, and have a high liquid-absorbing capacity.

6. The carboxymethyl cellulose wound dressing according to claim 4, wherein the hydrophobic layer fiber is one or more of polyester, polyamide, spandex, polypropylene, polyvinyl chloride, and acrylic.

7. A carboxymethyl cellulose wound dressing according to claim 1, characterized in that the adhesive layer (4) is one or more of white latex, butyl rubber, epoxy glue, polyurethane glue, acrylate glue, polyvinyl acetate glue.

8. A carboxymethyl cellulose wound dressing according to claim 1, characterised in that the substrate (5) is a non-woven or polyurethane film.