CN220676249U - Medical dressing and sheet-shaped composite substrate thereof - Google Patents
Medical dressing and sheet-shaped composite substrate thereof Download PDFInfo
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- CN220676249U CN220676249U CN202321727429.1U CN202321727429U CN220676249U CN 220676249 U CN220676249 U CN 220676249U CN 202321727429 U CN202321727429 U CN 202321727429U CN 220676249 U CN220676249 U CN 220676249U
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- breathable film
- dressing
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- composite substrate
- sheet
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- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 239000000758 substrate Substances 0.000 title claims abstract description 34
- 239000004744 fabric Substances 0.000 claims abstract description 63
- 229920002334 Spandex Polymers 0.000 claims abstract description 24
- 239000004759 spandex Substances 0.000 claims abstract description 24
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 239000002121 nanofiber Substances 0.000 claims description 8
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 235000010413 sodium alginate Nutrition 0.000 claims description 5
- 239000000661 sodium alginate Substances 0.000 claims description 5
- 229940005550 sodium alginate Drugs 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009940 knitting Methods 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 58
- 206010052428 Wound Diseases 0.000 description 15
- 208000027418 Wounds and injury Diseases 0.000 description 15
- 230000029663 wound healing Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 210000000416 exudates and transudate Anatomy 0.000 description 4
- 239000000017 hydrogel Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000035876 healing Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000001523 electrospinning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 208000035143 Bacterial infection Diseases 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 206010063560 Excessive granulation tissue Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 239000004826 Synthetic adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 208000022362 bacterial infectious disease Diseases 0.000 description 1
- 230000008952 bacterial invasion Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 210000001126 granulation tissue Anatomy 0.000 description 1
- 230000036074 healthy skin Effects 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000000416 hydrocolloid Substances 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000007838 tissue remodeling Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Materials For Medical Uses (AREA)
Abstract
The utility model discloses a medical dressing and a sheet-shaped composite substrate thereof, wherein the sheet-shaped composite substrate is used for the medical dressing, the sheet-shaped composite substrate comprises a waterproof breathable film, an elastic fabric layer and a dressing layer which are sequentially and tightly overlapped from top to bottom, and the dressing layer is used for contacting a wound surface part of a human body; the elastic fabric layer is of a grid fabric structure and is woven by spandex core-spun yarns. The elastic fabric layer is woven by spandex core-spun yarns, is combined with the waterproof and breathable film to endow the waterproof and breathable film with good elasticity and strength, reduces the problem that the waterproof and breathable film is easy to deform after being pulled under stress, improves the capability of the waterproof and breathable film for resisting external force deformation, and has the advantage that the movement of a user is not limited after the waterproof and breathable film is used. On the other hand, the elastic fabric layer is of a grid fabric structure or a mesh knitting fabric structure, and the mesh/mesh structure keeps excellent air permeability of the flaky composite substrate and is good in air permeability.
Description
Technical Field
The utility model relates to a medical dressing, in particular to a medical dressing and a sheet-shaped composite substrate thereof.
Background
The traditional medical dressing such as medical absorbent cotton gauze has the advantages of easily available raw materials, simple and convenient manufacturing process, low price, soft texture, strong moisture absorption capability and certain protection effect on skin healing. However, after the traditional dressing absorbs moisture, exudates diffuse along the fabric, so that the fabric is hard to harden, healthy skin tissues around the wound surface are affected, skin healing is not facilitated, meanwhile, new granulation tissues are easy to adhere when the dressing is replaced, pain is caused, secondary damage is caused, barrier function is poor after the dressing is permeated, and bacterial infection is easy to occur. For this reason, new medical dressings are continually being developed.
The Chinese patent publication No. CN215020475U discloses a medical dressing structure, which comprises a laying part which is in direct contact with human skin; the connecting part is used for being connected with the laying part and has the same size and shape as the laying part; the fixing parts are symmetrically arranged at the periphery of the connecting part and are used for fixing the connecting part and the human skin; and the shape supplementing part is arranged at the whole periphery formed by the connecting part and the fixing part and is used for supplementing the whole shape into a rectangle, and a tearing line is arranged at the joint of the shape supplementing part and the whole.
In the prior art, a medical adhesive tape layer is used as a bottom layer, and a waterproof PE film is generally made of materials. However, the applicant found that the elasticity and strength of the conventional PE film are insufficient, and the PE film is easily deformed after being pulled by force, such as caused by the movement of a human body after use at the joint portion. The PE film is used as the outermost layer of the medical dressing to play a role in waterproof and ventilation, and the barrier function of the PE film is poor after deformation, so that the quality of the PE film is related to wound surface recovery.
Disclosure of Invention
In order to overcome the technical defects, the utility model provides a medical dressing and a sheet-shaped composite substrate thereof.
In order to solve the problems, the utility model is realized according to the following technical scheme:
in a first aspect, the utility model provides a sheet-shaped composite substrate which is used for medical dressing, wherein the sheet-shaped composite substrate comprises a waterproof breathable film, an elastic fabric layer and a dressing layer which are sequentially and tightly overlapped from top to bottom, and the dressing layer is used for contacting a wound surface part of a human body;
the elastic fabric layer is of a grid fabric structure and is woven by spandex core-spun yarns.
Preferably, the outer contour shape of the elastic fabric layer is matched with the outer contour shape of the waterproof breathable film;
the outer contour of the dressing layer is much smaller than that of the waterproof breathable film.
Preferably, the spandex core-spun yarn comprises spandex filaments as yarn cores and nylon filaments wrapping the peripheral surfaces of the spandex filaments, and the linear density of the spandex core-spun yarn is 4.7tex.
Preferably, the waterproof breathable film is a polyethylene film having a plurality of microporous structures.
Preferably, the dressing layer is made of polyvinyl alcohol/sodium alginate nanofibers.
Preferably, the dressing layer is made of a hydrogel dressing.
In a second aspect, the present utility model further provides a medical dressing, including the sheet-shaped composite substrate according to the first aspect, the medical dressing further includes release paper, the release paper is attached to the waterproof breathable film, and the elastic fabric layer and the dressing layer are both located between the sheet-shaped composite substrate and the release paper.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a sheet-shaped composite substrate which is used for medical dressing, wherein the sheet-shaped composite substrate comprises a waterproof breathable film, an elastic fabric layer and a dressing layer which are sequentially and tightly overlapped from top to bottom, and the dressing layer is used for contacting a wound surface part of a human body; the elastic fabric layer is of a grid fabric structure and is woven by spandex core-spun yarns.
According to the design, the elastic fabric layer is compounded on the waterproof breathable film, so that on one hand, the elastic fabric layer is woven by the spandex core-spun yarn and is combined with the waterproof breathable film to endow the waterproof breathable film with good elasticity and strength, the problem that the waterproof breathable film is easy to deform after being pulled by being stressed is solved, the external force deformation resistance of the waterproof breathable film is improved, and the waterproof breathable film has the advantage that the movement of a user is not limited after being used. On the other hand, the elastic fabric layer is of a grid fabric structure, the hollow fabric with meshes is used for greatly reducing the problem of air permeability reduction caused by the composite elastic fabric layer, and the mesh/mesh structure keeps the excellent air permeability of the flaky composite substrate and is good in air permeability.
Drawings
The utility model is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic layer structure of a sheet-like composite substrate for a medical dressing of the present utility model;
FIG. 2 is a schematic plan view of a circular sheet-like composite substrate of the present utility model;
FIG. 3 is a schematic plan view of a square sheet-like composite substrate of the present utility model;
in the figure:
10-a waterproof breathable film;
20-an elastic facestock layer; 30-dressing layer.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
As shown in fig. 1 to 3, a preferred structure of a medical dressing and a sheet-like composite substrate thereof according to the present utility model is shown.
As shown in fig. 1, the sheet-shaped composite substrate is used for medical dressing, and comprises a waterproof breathable film 10, an elastic fabric layer 20 and a dressing layer 30 which are tightly laminated in sequence from top to bottom, wherein the dressing layer is used for contacting a wound surface part of a human body; the elastic fabric layer is of a grid fabric structure and is woven by spandex core-spun yarns.
The technical principle of the utility model is as follows: the sheet-shaped composite substrate is formed by compositing an elastic fabric layer on the waterproof breathable film, on one hand, the elastic fabric layer is woven by spandex core-spun yarns, is combined with the waterproof breathable film to endow the waterproof breathable film with good elasticity and strength, reduces the problem that the waterproof breathable film is easy to deform after being pulled by stress, improves the external force deformation resistance of the waterproof breathable film, and has the advantage that the movement of a user is not limited after the use. On the other hand, the elastic fabric layer is of a grid fabric structure or a mesh knitting fabric structure, and the mesh fabric structure or the mesh knitting fabric structure is hollow fabrics with meshes/meshes, so that the problem of air permeability reduction caused by the composite elastic fabric layer is greatly reduced, and the mesh/mesh structure keeps excellent air permeability of the sheet-shaped composite base material and has good air permeability.
In one implementation, when the elastic fabric layer is in a mesh fabric structure, the mesh size of the elastic fabric layer can be selectively determined according to the applied medical dressing, for example, when the medical dressing is used for a smaller wound surface, the surface area of the medical dressing is not large, and at this time, the mesh size of the elastic fabric layer can be set to be 1-5 mm.
In one implementation, the elastic fabric layer may also be a mesh knitted fabric structure, and it is understood that the elastic fabric layer is a mesh fabric, preferably a single-layer mesh fabric with a larger mesh distribution density.
The elastic fabric layer is selected from a grid fabric structure or a mesh knitting fabric structure, so that the influence of the flaky composite substrate on the air permeability is reduced. On the other hand, the elastic fabric layer is selected, and the mesh holes/meshes of the elastic fabric layer can expose the waterproof and breathable film, so that the compounding of the waterproof and breathable film and the dressing layer is reduced.
In one implementation, the outer contour shape of the elastic fabric layer is adapted to the outer contour shape of the waterproof breathable film; the outer contour of the dressing layer is much smaller than that of the waterproof breathable film.
Preferably, the outer contour shape of the elastic fabric layer is slightly smaller than the outer contour shape of the waterproof breathable film.
As shown in fig. 2 and 3, the sheet-like composite substrate has a circular or square shape, which is the most common shape of medical dressings. In another implementation, the sheet-like composite substrate may be of any shape, and correspondingly, the dressing layer may be of a shape in which the outer contour of the sheet-like composite substrate is equally reduced.
In one implementation, the spandex core-spun yarn comprises spandex filaments as yarn cores and nylon filaments wrapping the peripheral surfaces of the spandex filaments, and the spandex core-spun yarn has a linear density of 4.7tex.
The core-spun yarn also takes spandex fiber as core yarn, the core yarn wraps nylon stretch yarn in an elongation state, the core-spun yarn generally contains 20% -25% of spandex fiber, and the elastic elongation rate is high. Specifically, the spandex core-spun yarn is selected from commercial products. The elastic fabric layer can be ultrathin and has better elasticity by organically combining good elasticity of spandex with high-strength and wear-resistant nylon to form the core-spun yarn, so that the sheet-shaped composite base material and the medical dressing are endowed with better elasticity and strength.
In one implementation, the waterproof breathable film is a polyethylene film having a plurality of microporous structures.
In one implementation, the waterproof breathable film and the elastic fabric layer are pre-compounded, and the waterproof breathable film and the elastic fabric layer can be combined into a whole through hot pressing and the like. The elastic fabric layer can be completely wrapped by the waterproof breathable film, and can also be embedded and compounded on the waterproof breathable film, namely, a small part of the elastic fabric layer can be exposed on the surface of the waterproof breathable film.
In one implementation, the dressing layer is made of polyvinyl alcohol/sodium alginate nanofibers.
Wound healing is a complex process involving four overlapping stages of hemostasis, inflammation, proliferation and tissue remodeling. Wound dressings can be effective in promoting wound healing by preventing excessive loss of fluid, promoting epithelial remodeling, maintaining a moist healing environment, good adherence to the wound area, and allowing the patient to be comfortably removed. The high water content is to promote wound healing and improve comfort. The waterproof function can isolate water vapor and dust, and protect the wound from being infected by external liquid containing a large amount of bacteria, so that the use scene of the dressing in life is widened, and the limitation of the dressing is reduced. Therefore, an ideal medical dressing should have the ability to absorb and exclude large amounts of exudates, hinder bacterial invasion, and protect the wound from the external environment. Based on these requirements, the sheet-like composite substrate of the present technology can prevent permeation of liquid water, realize transmission of water vapor, and hinder invasion of bacteria. On the other hand, the polyvinyl alcohol/sodium alginate nanofiber pad is used as the composite medical dressing of the wound healing inner layer.
In one embodiment, the dressing layer is formed on the composite structure of the waterproof breathable film and the elastic fabric layer using an electrospinning technique. Electrospinning is a simple and effective processing technique that can produce nanofibers.
In a specific preparation process, glutaraldehyde can be used for crosslinking the polyvinyl alcohol/sodium alginate nanofiber mat. Glutaraldehyde is the most commonly used cross-linking agent in wound dressing applications and is used in varying concentrations to cross-link biopolymers to improve their mechanical properties. The crosslinked mixtures generally exhibit higher water stability and mechanical strength.
Through the technology, the flaky composite substrate meets the waterproof and vapor-permeable requirements and is beneficial to wound healing. The dressing layer is a nanofiber pad with a reticular structure, and the porous reticular structure is beneficial to cell respiration, does not dry the wound and promotes the wound to heal efficiently. And the net structure shows that the ratio of the surface area to the volume is high, so that the absorption rate of wound exudates is higher, and the net structure has good potential in promoting wound healing.
In another embodiment, the dressing layer is made of a hydrogel dressing. The hydrogel dressing is also called hydrocolloid dressing, and is made up by mixing elastic polymerized hydrogel with synthetic rubber and adhesive. The most common gel in dressings is hydroxymethyl cellulose, which adheres firmly to the wound edge skin and swells 12 times when absorbing exudates.
The utility model also provides a medical dressing, which comprises the flaky composite substrate and release paper, wherein the release paper is attached to the waterproof breathable film, and the elastic fabric layer and the dressing layer are both positioned between the flaky composite substrate and the release paper.
The present utility model is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical proposal of the present utility model.
Claims (3)
1. A sheet-like composite substrate for use in a medical dressing, characterized in that:
the flaky composite substrate comprises a waterproof breathable film, an elastic fabric layer and a dressing layer which are sequentially and tightly overlapped from top to bottom, and the dressing layer is used for contacting the wound surface part of a human body;
the elastic fabric layer is of a grid fabric structure, and is woven by spandex core-spun yarns, wherein the spandex core-spun yarns comprise spandex filaments serving as yarn cores and nylon filaments wrapping the peripheral surfaces of the spandex filaments, and the linear density of the spandex core-spun yarns is 4.7tex;
the waterproof breathable film is a polyethylene film with a plurality of micropore structures;
the dressing layer is a nanofiber pad with a net-shaped structure, and the dressing layer is made of polyvinyl alcohol/sodium alginate nanofibers.
2. A sheet-like composite substrate according to claim 1, wherein:
the outer contour shape of the elastic fabric layer is matched with the outer contour shape of the waterproof breathable film;
the outer contour of the dressing layer is much smaller than that of the waterproof breathable film.
3. A medical dressing, characterized in that the medical dressing comprises the sheet-shaped composite substrate according to claim 1 or 2, and further comprises release paper, wherein the release paper is attached to the waterproof breathable film, and the elastic fabric layer and the dressing layer are both positioned between the sheet-shaped composite substrate and the release paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321727429.1U CN220676249U (en) | 2023-07-04 | 2023-07-04 | Medical dressing and sheet-shaped composite substrate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321727429.1U CN220676249U (en) | 2023-07-04 | 2023-07-04 | Medical dressing and sheet-shaped composite substrate thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220676249U true CN220676249U (en) | 2024-03-29 |
Family
ID=90404233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321727429.1U Active CN220676249U (en) | 2023-07-04 | 2023-07-04 | Medical dressing and sheet-shaped composite substrate thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220676249U (en) |
-
2023
- 2023-07-04 CN CN202321727429.1U patent/CN220676249U/en active Active
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