Dressing capable of improving ductility and preparation process thereof

Abstract

The invention relates to the technical field of medical dressings, in particular to a dressing capable of improving ductility and a preparation process thereof.The dressing comprises a thin film layer, a liquid absorption layer and a contact layer which are arranged in a stacked mode from top to bottom, and the liquid absorption layer is provided with fibers extending in any plane direction; a plurality of notches are formed in the dressing for improving the ductility and penetrate through the liquid absorption layer in the lamination direction, so that a plurality of independent liquid absorption units are formed in the liquid absorption layer, and the liquid absorption units can be separated from one another; the liquid absorbing layer can be cut into mutually independent liquid absorbing units by forming the through cut in the liquid absorbing layer, the ductility of the thin film layer connected with the liquid absorbing layer and the ductility of the contact layer are released, and the problem that in the prior art, when the dressing covers a part where high shear stress is likely to be generated, the dressing is prone to be damaged is solved. The technical problem that the dressing comfort is easily reduced or the wound dressing part falls off is solved, it is guaranteed that the dressing is well attached to the human body when the dressing covers flexible parts such as elbows and knees, and the comfort of the dressing is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wound dressings, and particularly to a dressing with improved ductility and its preparation process. Background Art

[0002] Wound dressings are mainly used for various exudative wounds to absorb exudate and provide a good healing environment. In the past wound care process, self-adhesive wound dressings were often used. By covering the wound dressing on the wound surface, the wound dressing can absorb the wound exudate.

[0003] Wound dressings generally have a liquid-absorbing layer made of a non-woven fabric layer. Through the non-woven fabric layer, the diffusion and absorption of exudate are realized to achieve the purpose of absorbing wound exudate. The fibers in the non-woven fabric have poor ductility, resulting in poor ductility of the non-woven fabric, and further poor overall ductility of the wound dressing. When the wound dressing is covered on a part that generates high shear stress on the wound dressing, such as the bending of the knee or elbow, problems such as reduced dressing comfort or partial detachment of the wound dressing will occur. In order to solve this problem, existing wound dressings generally set a number of interfaces on the non-woven fabric layer to improve the ductility of the wound dressing.

[0004] However, for existing wound dressings, no matter how the incisions are set on the liquid-absorbing layer, it is still a whole. When covering a part that generates high shear stress on the wound dressing, such as the bending of the knee or elbow, problems such as reduced dressing comfort or partial detachment of the wound dressing still easily occur. Summary of the Invention

[0005] The inventors of the present invention have intensively studied and found that the film layer and the contact layer constituting the dressing generally have good ductility, but the overall ductility becomes poor after forming the dressing. This is because the fibers constituting the liquid-absorbing layer have poor ductility, resulting in the loss of the original ductility of the film layer and the contact layer bonded thereto.

[0006] The present invention is completed in view of the above findings, and its purpose is to provide a dressing with improved ductility and its preparation process to solve the technical problems that when the existing wound dressing is covered on a part prone to generate high shear stress, the dressing comfort is easily reduced or the wound dressing is partially detached.

[0007] In a first aspect, a dressing with improved ductility provided by the present invention includes a film layer, a liquid-absorbing layer, and a contact layer stacked from top to bottom. The liquid-absorbing layer has fibers extending along any planar direction.

[0008] A number of incisions are formed in the dressing with improved ductility. The incisions penetrate the liquid-absorbing layer along the stacking direction, so that the liquid-absorbing layer forms a number of mutually independent liquid-absorbing units, and the liquid-absorbing units can be separated from each other.

[0009] Further, the length of the liquid absorption unit in its planar direction is set to be 2 mm to 30 mm.

[0010] Further, the width of the liquid absorption unit in its planar direction is set to be 2 mm to 30 mm.

[0011] Further, the liquid absorption layer further includes a frame, the frame is disposed around the edge of the liquid absorption layer, and a plurality of the liquid absorption units are disposed within the frame.

[0012] Further, the liquid absorption layer further includes connecting ribs, the connecting ribs are formed between the liquid absorption units by cutting through the cutouts, and both ends of the connecting ribs are respectively connected to the frame.

[0013] Further, the fibers of the liquid absorption layer all extend in the same direction, and the extending direction of the connecting ribs is set at an angle to the extending direction of the fibers.

[0014] Further, the maximum length of the connecting ribs in the extending direction of the fibers is set to be 1 mm to 30 mm.

[0015] Further, a plurality of slits are formed in the liquid absorption unit, the slits penetrate through the liquid absorption layer in the stacking direction, and the extending direction of the slits is set at an angle to the extending direction of the fibers.

[0016] Further, the liquid absorption layer includes a superabsorbent non-woven fabric layer and a spunlace non-woven fabric layer, and the superabsorbent non-woven fabric layer and the spunlace non-woven fabric layer are stacked up and down.

[0017] Further, the planar shape of the liquid absorption unit can be circular, square, rhombic, triangular or hexagonal.

[0018] Further, the dressing for enhancing ductility further includes a foam layer, the foam layer is disposed between the liquid absorption layer and the contact layer, and a plurality of the cutouts penetrate through the foam layer in the stacking direction, so that the foam layer forms a plurality of independent foam units, and the foam units can be separated from each other.

[0019] Further, the dressing for enhancing ductility further includes a protective layer, the protective layer is disposed at the bottom of the contact layer, and the protective layer is adhered to the contact layer.

[0020] In a second aspect, the present invention further provides a dressing preparation process for manufacturing the above-mentioned dressing for enhancing ductility, including the following steps:

[0021] Step 1: Stack and combine the superabsorbent non-woven fabric layer and the spunlace non-woven fabric layer to form a liquid absorption layer;

[0022] Step 2: Bond the liquid absorption layer to the contact layer to form a body to be cut;

[0023] Step 3: Place the body to be cut on a cutting platform and convey it to a cutting roller set. Cut the body to be cut with a cutter on the cutting roller set to form a number of independent and separable liquid absorption units in the liquid absorption layer;

[0024] Step 4: Co - laminate the film layer, the cut body to be cut, and the protective layer to form a multi - layer dressing raw material;

[0025] Step 5: Cut and package the formed multi - layer dressing raw material to form a dressing product with improved ductility.

[0026] Further, in Step 2, the liquid absorption layer and the foam layer are bonded in the body to be cut.

[0027] Compared with the prior art, a dressing with improved ductility provided by the present invention includes a film layer, a liquid absorption layer, and a contact layer stacked from top to bottom. The liquid absorption layer has fibers extending along any planar direction. A number of incisions are formed in the dressing with improved ductility. The incisions penetrate the liquid absorption layer along the stacking direction, so that the liquid absorption layer forms a number of independent liquid absorption units, and the liquid absorption units can be separated from each other. By providing through - incisions in the liquid absorption layer, the liquid absorption layer can be cut into independent liquid absorption units, so that the poorly ductile fibers extending along any planar direction in the liquid absorption layer are also cut. Furthermore, the originally long poorly ductile fibers in the liquid absorption layer are transformed into short fibers in each independent liquid absorption unit, thereby releasing the ductility of the film layer and the contact layer itself connected to the liquid absorption layer, solving the technical problems that when the dressing in the prior art covers parts prone to high shear stress, the dressing comfort is easily reduced or part of the wound dressing falls off, improving the ductility of the dressing, ensuring good fit with the human body when the dressing covers flexible parts such as elbows and knees, and improving the comfort of the dressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic diagram of the overall structure of the dressing with improved ductility provided by the embodiment of the present invention;

[0030] Figure 2 It is a planar structure diagram of the liquid absorption layer in the dressing with improved ductility provided by an embodiment of the present invention;

[0031] Figure 3 It is a plan view of the liquid absorption layer in the dressing for improving ductility provided in the second embodiment of the present invention;

[0032] Figure 4 It is a plan view of the liquid absorption layer in the dressing for improving ductility provided in the third embodiment of the present invention.

[0033] Reference numerals:

[0034] 100, thin film layer;

[0035] 200, liquid absorption layer;

[0036] 210, incision; 220, liquid absorption unit; 221, cut; 230, frame; 240, connecting rib;

[0037] 300, contact layer;

[0038] 400, foam layer. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0041] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0045] In the preparation of conventional dressings, the liquid absorption layer is made of non-woven fabric material. The non-woven fabric material is a non-woven fabric. It directly uses polymer chips, short fibers or filaments to form a web of fibers through air flow or mechanical means, and then is reinforced by hydroentangling, needling, or hot rolling, and finally forms a non-woven fabric through post-treatment. Therefore, generally there are relatively long fibers extending along the forming direction in the non-woven fabric. The inventors of the present invention found that the film layer and the contact layer constituting the dressing generally have good ductility, but the overall ductility becomes poor after the dressing is formed because the fibers constituting the liquid absorption layer have poor ductility, resulting in the film layer and the contact layer adhered to it losing their original ductility. It can be analogized to pasting a row of toothpicks between two plastic films with excellent ductility, and the ductility of the formed object depends on the material with the worst ductility in the formed object.

[0046] The present invention is completed in view of the above findings. By using the method of cutting the fibers with poor ductility as short as possible along the fiber extension direction on the premise of not affecting the actual efficacy of the dressing, the ductility of the film layer and the contact layer itself, which originally have excellent ductility, is released, thereby improving the overall ductility of the dressing.

[0047] Of course, the structural layout of the dressing for enhancing ductility in the present application is not limited to the dressing made of non-woven fabric with fibers having the same extension direction. It can also be applied to non-woven fabrics with fibers of various directions intertwined.

[0048] Embodiment 1

[0049] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a dressing for enhancing ductility, including a film layer 100, a liquid absorption layer 200, and a contact layer stacked from top to bottom. The liquid absorption layer 200 has fibers extending along any plane direction. A plurality of incisions 210 are formed in the dressing for enhancing ductility. The incisions 210 penetrate the liquid absorption layer 200 along the stacking direction, so that the liquid absorption layer 200 forms a plurality of independent liquid absorption units 220, and the liquid absorption units 220 can be separated from each other.

[0050] That is, for the dressing for enhancing ductility provided by the present invention, by providing the penetrating incisions 210 in the liquid absorption layer 200, the liquid absorption layer 200 can be cut into independent liquid absorption units 220, so that the fibers with poor ductility extending along any plane direction in the liquid absorption layer 200 are also cut accordingly. Furthermore, the originally long fibers with poor ductility in the liquid absorption layer 200 are transformed into short fibers in each independent liquid absorption unit 220, thereby releasing the ductility of the film layer 100 connected to the liquid absorption layer 200 and the contact layer itself, solving the technical problems in the prior art that when the dressing covers the parts prone to high shear stress, the dressing comfort is easily reduced or part of the wound dressing falls off, improving the ductility of the dressing, ensuring good fitting of the dressing to the human body when covering flexible parts such as elbows and knees, and improving the comfort of the dressing.

[0051] Specifically, the dressing for enhancing ductility provided in this embodiment is in the shape of a rectangular flat plate as a whole. The contact layer is made of silicone material, and uniform through-holes are provided on the contact layer made of silicone, so as to form a silicone mesh. Due to the adhesiveness of the silicone material itself, the dressing can be comfortably attached to the human body. The film layer 100 is specifically made of polyurethane material and is rectangular in shape. Its edge is attached to the contact layer by lamination. The liquid absorption layer 200 is provided as a core layer between the film layer 100 and the contact layer. The liquid absorption layer 200 is specifically made of super-absorbent non-woven fabric and is in the shape of a rectangular plane as a whole. The film layer 100, the liquid absorption layer 200, and the contact layer are stacked from top to bottom. The incision 210 penetrates the liquid absorption layer 200 from the top of the liquid absorption layer 200 and completely cuts off the fibers with poor ductility in the liquid absorption layer 200 in the vertical direction. In this embodiment, the incision 210 includes two groups of intersecting linear incisions 210, and each group of linear incisions 210 includes a plurality of parallel linear incisions 210, thereby cutting the entire liquid absorption layer 200 into a plurality of diamond-shaped liquid absorption units 220. The fiber length in each liquid absorption unit 220 is also the maximum linear length of the liquid absorption unit 220 in the plane direction. Thus, the purpose of shortening the length of the fibers with poor ductility in the liquid absorption layer 200 and releasing the excellent ductility of the film and the silicone layer adhered to the liquid absorption layer 200 is achieved. Whenever the body part where the dressing is attached moves and the dressing is pulled, the film layer 100 and the contact layer will be subjected to a tensile force, which will then drive the liquid absorption layer 200 to stretch accordingly. At this time, the liquid absorption units 220 in the liquid absorption layer 200 will be dispersed or deformed along the direction of the force when subjected to the corresponding tensile force, reducing the resistance generated when the dressing deforms, thereby avoiding excessive pulling of the contact layer on the human skin adhered thereto and also avoiding the separation of the contact layer from the human skin, resulting in the detachment of the dressing.

[0052] Preferably, the cross-sectional shape of the liquid absorption unit 220 along the extension plane of the liquid absorption layer 200 is diamond-shaped, square, triangular, circular or hexagonal.

[0053] Specifically, in the above embodiment, the liquid absorption unit 220 is cut into a diamond shape by two groups of intersecting linear incisions 210. In other embodiments of the present application, the liquid absorption unit 220 can also be set into other shapes according to the actual production process and usage requirements. For example, a square liquid absorption unit 220 can be cut on the liquid absorption layer 200 by two groups of intersecting linear incisions 210 with the same spacing. Or a hexagonal incision 210 can be used to enclose a planar honeycomb-shaped incision 210 to cut the liquid absorption layer 200 into hexagonal liquid absorption units 220. Or a plurality of circular or triangular liquid absorption units 220 can be cut on the liquid absorption layer 200 by circular incisions 210 or triangular incisions 210. In other embodiments of the present application, the liquid absorption unit 220 can also be set into other irregular shapes.

[0054] The core layer of a general wound dressing is set to be square, and the side length dimension is generally in the range of 2.5 cm to 35 cm. From a theoretical perspective, the denser the incisions 210 are, the smaller the liquid absorption units 220 are cut, the shorter the fibers in the liquid absorption units 220 are, and the better the ductility of the liquid absorption layer 200 is. However, due to limitations in the production process, the denser the incisions 210 are and the smaller the liquid absorption units 220 are cut, the higher the production cost is. In order to further ensure that cutting the liquid absorption units 220 can completely cut the fibers with poor ductility in the liquid absorption layer 200 and ensure that the fibers in the liquid absorption layer 200 are all short fibers with less impact on ductility, it is necessary to limit the length of the fibers inside the liquid absorption units 220, while ensuring that the production cost is controllable and maximizing the ductility of the liquid absorption layer 200.

[0055] Preferably, the liquid absorption unit 220 is set to be 2 mm to 30 mm in its planar direction.

[0056] Specifically, taking the diamond-shaped liquid absorption unit 220 in the above embodiment as an example, the main distribution direction of the fibers in the liquid absorption layer 200 is Figure 1 the X direction in. The maximum length of each liquid absorption unit 220 along the fiber extension direction inside it, that is, the length of the diamond's horizontal diagonal, is the maximum length of the fibers with poor ductility in the liquid absorption unit 220. Thus, the length of the liquid absorption unit 220 along the fiber extension direction inside it is set to be 2 mm to 30 mm, that is, the maximum length of the fibers with poor ductility in the liquid absorption unit 220 is set to be 2 mm to 30 mm, thereby ensuring good ductility of the liquid absorption layer 200 while controlling the production cost.

[0057] Based on the technology of the above embodiment, the factors affecting the ductility of the liquid absorption layer 200 are not only the fiber length in the liquid absorption layer 200, but also the entanglement between the fibers restricts the ductility in the fiber width direction. Preferably, the width of the liquid absorption unit 220 in its planar direction is set to be 2 mm to 30 mm.

[0058] Specifically, taking the absorbent layer 200 when the liquid absorption unit 220 in the above embodiment is diamond-shaped as an example, the main fiber direction in the absorbent layer 200 is the X direction in the figure. The width along the direction perpendicular to the fiber extension direction inside each liquid absorption unit 220, that is, the longitudinal distance of the diamond shape, determines how many fibers entangled with each other in the fiber width direction are in each liquid absorption unit 220. Thus, the width along the direction perpendicular to the fiber extension direction inside the liquid absorption unit 220 is set to 2 mm to 30 mm, which limits the number of fibers entangled with each other in the fiber width direction of each liquid absorption unit 220, thereby ensuring the overall ductility of the absorbent layer 200. To further improve the ductility of the absorbent layer 200, a plurality of slits 221 are formed in the liquid absorption unit 220. The slits 221 penetrate the absorbent layer 200 along the lamination direction, and the extension direction of the slits 221 is set at an angle to the extension direction of the fibers.

[0059] Specifically, since the maximum length of the poorly ductile fibers in the liquid absorption unit 220 determines the ductility of the absorbent layer 200, to further improve the ductility of the absorbent layer 200, it is necessary to further reduce the maximum length of the fibers in the liquid absorption unit 220. The slits 221 can be specifically arranged in the middle of each liquid absorption unit 220. By further cutting the liquid absorption unit 220 through the slits 221, the fibers in the liquid absorption unit 220 can be further cut off. In this embodiment, the slits 221 are arranged along the direction perpendicular to the extension direction of the fibers. In other embodiments of the present application, the extension direction of the slits 221 only needs to be set at an angle to the extension direction of the fibers, as long as it is ensured that the slits 221 can effectively cut the fibers in the liquid absorption unit 220. Thus, the dressing provided in this embodiment further improves the ductility of the absorbent layer 200 by arranging the slits 221 in the liquid absorption unit 220, and further improves the ductility of the dressing.

[0060] Furthermore, the absorbent layer 200 is provided with a superabsorbent non-woven fabric layer and a spunlace non-woven fabric layer, and the superabsorbent non-woven fabric layer and the spunlace non-woven fabric layer are stacked up and down.

[0061] Specifically, the liquid absorption layer 200 provided in this embodiment is mainly composed of two non-woven fabrics, namely, a superabsorbent non-woven fabric layer and a spunlace non-woven fabric layer, which are stacked up and down. The superabsorbent non-woven fabric has good hydrophilicity and excellent water locking effect, while the spunlace non-woven fabric has good diffusibility and can evenly disperse the liquid entering this layer. Thus, the wound exudate entering the spunlace non-woven fabric will be diffused by the spunlace non-woven fabric in the plane direction into the spunlace non-woven fabric, and then absorbed and locked by the superabsorbent non-woven fabric on the spunlace non-woven fabric, realizing the absorption of the wound exudate. In this embodiment, the incision 210 penetrates the superabsorbent non-woven fabric layer and the spunlace non-woven fabric layer from top to bottom, thus realizing the common cutting of the two non-woven fabrics in the liquid absorption layer 200, and further ensuring that each liquid absorption unit 220 includes a superabsorbent non-woven fabric and a spunlace non-woven fabric stacked up and down. Ensure the wound exudate absorption capacity of each liquid absorption unit 220.

[0062] Furthermore, the dressing for enhancing ductility further includes a protective layer, which is disposed at the bottom of the contact layer, and the protective layer is bonded to the contact layer.

[0063] Specifically, the protective layer is specifically set as a release film, and its material can be a coated paper, PP material, PE material or a mixture of PP material and PE material. The protective layer is directly bonded to the bottom of the contact layer. Protect the contact layer during transportation to avoid external bacterial contamination of the contact layer. When the dressing needs to be covered on the human skin, only the protective layer needs to be removed, and the contact layer can be attached to the human skin.

[0064] Embodiment 2

[0065] As Figure 3 shown, the dressing for enhancing ductility provided in this embodiment is still composed of a film layer 100, a liquid absorption layer 200, a contact layer and a protective layer stacked up and down. The liquid absorption layer 200 still has fibers extending in any plane direction and has a number of through incisions 210, thus forming a number of independent liquid absorption units 220. Each liquid absorption unit 220 also contains two non-woven fabrics, namely, a superabsorbent non-woven fabric and a spunlace non-woven fabric. The incision 210 also still penetrates the superabsorbent non-woven fabric and the spunlace non-woven fabric from top to bottom, ensuring that each liquid absorption unit 220 includes a superabsorbent non-woven fabric and a spunlace non-woven fabric stacked up and down. A cut 221 can also be provided in each liquid absorption unit 220 to further enhance the ductility of the dressing. Compared with the technical solution in Embodiment 1, the liquid absorption layer 200 in this embodiment further includes a frame 230, which is disposed around the edge of the liquid absorption layer 200, and the liquid absorption unit 220 is disposed within the frame 230.

[0066] Specifically, taking the diamond-shaped liquid absorption unit 220 in the above embodiment as an example, the fiber direction in the liquid absorption layer 200 is Figure 2X direction. The incision 210 in this embodiment is only provided in the middle of the liquid absorbent layer 200, and no incision 210 is provided at the four side extension positions of the rectangular liquid absorbent layer 200. As a result, four end-to-end connected frames 230 are formed around the liquid absorbent layer 200, thereby forming a frame 230. Whenever the body part to which the dressing is attached moves and the dressing is pulled, the film layer 100 and the contact layer will be subjected to tension, thereby driving the liquid absorbent layer 200 to stretch accordingly. At this time, the uncut frame 230 will restrict the liquid absorbent unit 220 to prevent the liquid absorbent unit 220 from excessive displacement.

[0067] Embodiment 3

[0068] like Figure 4 As shown, the dressing for improving ductility provided in this embodiment is still composed of a film layer 100, a liquid-absorbing layer 200, a contact layer and a protective layer stacked from top to bottom. The liquid-absorbing layer 200 still has fibers extending in any plane direction and has a plurality of through cuts 210, thereby forming a plurality of independent liquid-absorbing units 220. Each liquid-absorbing unit 220 also includes two non-woven fabrics, namely, super absorbent non-woven fabric and spunlace non-woven fabric. The cuts 210 also still penetrate the super absorbent non-woven fabric and the spunlace non-woven fabric from top to bottom, ensuring that each liquid-absorbing unit 220 includes the super absorbent non-woven fabric and the spunlace non-woven fabric stacked from top to bottom. A cut 221 can also be provided in each liquid-absorbing unit 220 to further improve the ductility of the dressing. Each liquid-absorbing unit 220 is also provided with a frame 230 to improve the tensile resilience of the liquid-absorbing layer 200. Different from the above two embodiments, the arrangement of the cuts 210 in this embodiment is different. In other embodiments of the present application, each liquid absorption unit 220 may also include only one layer of super absorbent non-woven fabric.

[0069] Furthermore, the liquid absorbing layer 200 further includes connecting ribs, and a plurality of connecting ribs are formed between the liquid absorbing units 220 via the cutouts 210 , and both ends of the connecting ribs are respectively connected to the frame 230 .

[0070] Specifically, taking the diamond-shaped liquid absorption unit 220 as an example, for the liquid absorption layer 200 provided in this embodiment, the incision 210 includes multiple different groups of incisions 210. In each group of incisions 210, a number of incisions 210 are arranged at intervals and in the same straight-line direction. One part of all the groups of incisions 210 is arranged in parallel in any direction, and the other part is arranged in parallel in another direction intersecting with it. The two groups of incisions 210 are arranged crosswise to cut out the diamond-shaped liquid absorption unit 220 in the liquid absorption layer 200, and connection ribs are formed between the liquid absorption units 220. Both ends of the connection ribs are respectively connected to the frame 230. Whenever the body part where the dressing adheres moves and the dressing is pulled, the thin film layer 100 and the contact layer will be subjected to a tensile force, thereby driving the liquid absorption layer 200 to stretch accordingly. At this time, the connection ribs will also stretch accordingly, and limit the liquid absorption units 220 between the connection ribs to prevent the liquid absorption units 220 from excessive displacement. In other embodiments of the present application, for example, in the embodiment where the liquid absorption unit 220 is set to be circular, the incision 210 can be set to be circular and arranged on the liquid absorption layer 200 in a matrix manner, so as to cut the liquid absorption unit 220 into a circular shape and form connection ribs between the liquid absorption units 220. Thus, the dressing provided in this embodiment with improved ductility, by setting connection ribs between the liquid absorption units 220, limits the liquid absorption units 220 between the connection ribs to prevent the liquid absorption units 220 from excessive displacement, and plays a certain auxiliary role in the resilience of the dressing.

[0071] Further, the fibers of the liquid absorption layer 200 all extend in the same direction, and the extending direction of the connection ribs is set at an angle to the fiber extending direction.

[0072] Specifically, taking the liquid absorption layer 200 when the liquid absorption unit 220 is diamond-shaped as an example, the fibers of the liquid absorption layer 200 all extend along Figure 2 the X direction in the figure, and the incision 210 is set at an angle of 45° to the fiber extending direction. Thus, it can be avoided that the extending direction of the connection ribs is the same as the fiber extending direction, resulting in the retention of longer fibers with poor ductility that are not cut in the connection ribs, affecting the ductility of the liquid absorption layer 200, and further ensuring the ductility of the entire dressing.

[0073] Preferably, the maximum length of the connection ribs 240 along the fiber extending direction is set to 1 mm to 30 mm.

[0074] Specifically, setting the width of the connection ribs to 1 mm to 30 mm limits the maximum fiber length in the connection ribs and ensures the ductility of the liquid absorption layer 200.

[0075] Embodiment 4

[0076] Such as Figure 4As shown in the figure, the dressing for improving ductility provided in this embodiment is still composed of a film layer 100, a liquid absorption layer 200, a contact layer, and a protective layer that are stacked from top to bottom. The liquid absorption layer 200 still has fibers extending in any planar direction and has a number of through cuts 210, thereby forming a number of independent liquid absorption units 220. Each liquid absorption unit 220 also contains two non-woven fabrics, namely superabsorbent non-woven fabric and spunlace non-woven fabric. The cuts 210 also penetrate the superabsorbent non-woven fabric and the spunlace non-woven fabric from top to bottom, ensuring that each liquid absorption unit 220 includes a superabsorbent non-woven fabric and a spunlace non-woven fabric that are stacked from top to bottom. A slit 221 can also be provided in each liquid absorption unit 220 to further improve the ductility of the dressing. Each liquid absorption unit 220 is also provided with a border 230, and connecting ribs are provided between the liquid absorption units 220 to prevent excessive displacement of the liquid absorption units 220. Different from the above embodiment, the dressing for improving ductility provided in this embodiment further includes a foam layer 400. The foam layer 400 is disposed between the liquid absorption layer 200 and the contact layer, and a number of cuts 210 penetrate the foam layer 400, so that the foam layer 400 forms a number of independent foam units that can be separated from each other.

[0077] Specifically, the foam layer 400 is made of polyurethane foam material. By providing the foam layer 400, the liquid absorption effect of the dressing can be effectively improved. For the convenience of production, the foam layer 400 is assembled by stacking with the liquid absorption layer 200 and then cut. Thus, the cutting effect of the liquid absorption layer 200 is ensured. The same as the above embodiment, the cuts 210 include two groups of intersecting straight cuts 210, and each group of straight cuts 210 includes a plurality of parallel straight cuts 210, thereby cutting the entire foam layer 400 into a plurality of diamond-shaped foam units. In other embodiments of the present application, the foam units can also be set into other shapes according to the actual production process and usage requirements. For example, square foam units can be cut on the foam layer 400 by two groups of intersecting straight cuts 210 with the same spacing. Or a planar honeycomb-shaped cut 210 can be formed by enclosing hexagonal cuts 210, and the foam layer 400 can be cut into hexagonal foam units. Or a plurality of circular or triangular foam units can be cut on the foam layer 400 by circular cuts 210 or triangular cuts 210. The dressing provided in this embodiment improves the wound exudate absorption effect of the dressing by jointly forming a core layer with the foam layer 400 and the liquid absorption layer 200. At the same time, the foam layer 400 is also cut into independent units by the cuts 210 together with the liquid absorption layer 200. The foam units and the liquid absorption units 220 are stacked together to form core layer units, ensuring that the dressing has good ductility.

[0078] Embodiment Five

[0079] The present invention also provides a dressing preparation process for manufacturing the above-mentioned dressing with improved ductility, comprising the following steps:

[0080] Step 1: Stack and combine a superabsorbent non-woven fabric layer and a spunlace non-woven fabric layer to form a liquid absorption layer 200;

[0081] Step 2: Place the liquid absorption layer 200 on a cutting platform and convey it to a cutting roller set. Use the cutting knives on the cutting roller set to cut the object to be cut, and form a number of independent and separable liquid absorption units 220 in the liquid absorption layer 200;

[0082] Step 4: Co-laminate the film layer 100, the liquid absorption layer 200, the contact layer 300 and the protective layer to form a multi-layer dressing raw material;

[0083] Step 5: Cut and package the formed multi-layer dressing raw material to form a dressing product with improved ductility.

[0084] Specifically, when preparing the above-mentioned dressing with improved ductility, first, the superabsorbent non-woven fabric and the spunlace non-woven fabric are respectively unrolled from the raw material rollers and stacked and combined to form a complete liquid absorption layer 200. Subsequently, the complete liquid absorption layer 200 is conveyed onto the cutting platform. The cutting roller set is provided with cutting knives, which can penetrate and cut the liquid absorption layer 200, form incisions 210 on the liquid absorption layer 200, and form independent liquid absorption units 220. After cutting, the cut liquid absorption layer 200 is conveyed onto the contact layer and the release layer, and the film layer 100 is covered on the liquid absorption layer 200, and then conveyed to a laminating machine for laminating. Finally, the formed multi-layer dressing raw material is cut and packaged to form a dressing product with improved ductility.

[0085] Example 5

[0086] The difference between the dressing preparation process provided in this example and the dressing preparation process in Example 4 is that the dressing prepared in this example further includes a foam layer 400.

[0087] In the dressing preparation process provided by this embodiment, before cutting the liquid absorption layer 200, the foam stock solution is mixed and stirred, coated and foamed to form a foam layer 400. The foam layer 400, the liquid absorption layer 200 and the contact layer are laminated and assembled, and then jointly sent to a cutting platform for cutting. Subsequently, the foam layer 400 and the liquid absorption layer 200 are conveyed onto the cutting platform. The cutter on the cutting roller set penetrates and cuts the liquid absorption layer 200 and the foam layer 400 to form a cut 210, and the liquid absorption unit 220 and the foam unit are cut out. After the cutting is completed, the cut liquid absorption layer 200 and foam layer 400 need to be conveyed onto the contact layer and the release layer, and a film layer 100 is covered on the liquid absorption layer 200, and then conveyed to a molding machine for lamination molding. Finally, the formed multi-layer dressing raw material is cut and packaged to form a dressing product with improved ductility.

[0088] Based on the technology of the above embodiment, the embodiments of the present invention are compared and tested with dressings in the prior art. The test method is to stretch the dressing to a fixed deformation position, and a tensiometer is used to record the force required for the dressing to be stretched to the corresponding deformation position, and the ductility of the dressing is judged by the corresponding tensile force. The following is a comparison data table of the dressing with improved ductility in the embodiments of the present invention and the conventional dressings in the art.

[0089] Table 1 Dressing Tensile Test Data Table

[0090]

[0091] Among them, the dressing corresponding to dressing serial number 1 is a wound dressing composed of a film layer 100, a liquid absorption layer 200, a foam layer 400, a contact layer and a protective layer stacked from top to bottom. The dressing corresponding to dressing serial number 2 is a wound dressing composed of a film layer 100, a foam layer 400, a contact layer and a protective layer stacked from top to bottom. The dressing corresponding to dressing serial number 3 is the dressing with improved ductility in the fourth embodiment of this application. The dressing corresponding to dressing serial number 4 is the dressing with improved ductility in the first embodiment of this application. And the three groups of tensile data in the table are the tensile data obtained by stretching the dressing in three directions: longitudinal, transverse and oblique. It can be seen from the data in the above table that by providing a penetrating cut 210 in the liquid absorption layer 200, after the liquid absorption layer 200 is cut into independent liquid absorption units 220, the force required for the dressing to be stretched to the corresponding deformation position can be effectively reduced, releasing the ductility of the film layer 100 connected to the liquid absorption layer 200 and the contact layer itself, improving the ductility of the dressing, ensuring good fit with the human body when the dressing covers flexible parts such as elbows and knees, and improving the comfort of the dressing.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dressing for improving extensibility, comprising a film layer (100), a liquid-absorbing layer (200) and a contact layer (300) stacked from top to bottom, characterized in that: The liquid-absorbing layer (200) has fibers extending in any planar direction; A plurality of incisions (210) are formed in the extensibility-enhancing dressing. The cutout (210) penetrates the liquid absorbing layer (200) along the stacking direction, so that the liquid absorbing layer (200) forms a plurality of mutually independent liquid absorbing units (220). The liquid suction units (220) are separable from each other.

2. The dressing for improving extensibility according to claim 1, characterized in that: The maximum length of the liquid absorbing unit (220) along its plane direction is set to 2 mm to 30 mm.

3. The dressing for improving extensibility according to claim 2, characterized in that: The maximum width of the liquid absorbing unit (220) along its plane direction is set to 2 mm to 30 mm.

4. The dressing for improving extensibility according to claim 3, characterized in that: The liquid absorbing layer (200) further comprises a frame (230), wherein the frame (230) is arranged around the edge of the liquid absorbing layer (200), and a plurality of the liquid absorbing units (220) are arranged in the frame (230).

5. The dressing for improving extensibility according to claim 4, characterized in that: The liquid absorbing layer (200) further comprises a connecting rib (240), wherein the connecting rib (240) is formed between the liquid absorbing units (220) via the incision (210), and both ends of the connecting rib (240) are respectively connected to the frame (230).

6. The dressing for improving extensibility according to claim 5, characterized in that: The fibers of the liquid-absorbing layer (200) all extend in the same direction, and the extending direction of the connecting ribs (240) is arranged at an angle to the extending direction of the fibers.

7. The dressing for improving extensibility according to claim 6, characterized in that: The maximum length of the connecting rib (240) along the extension direction of the fibers is set to 1 mm to 30 mm.

8. The dressing for improving extensibility according to any one of claims 1 to 7, characterized in that: A plurality of cutouts (221) are formed in the liquid absorbing unit (220), and the cutouts (221) penetrate the liquid absorbing layer (200) along the stacking direction. The extension direction of the cut (221) is arranged at an angle to the extension direction of the fiber.

9. The dressing for improving extensibility according to claim 8, characterized in that: The liquid-absorbing layer (200) comprises a super absorbent non-woven fabric layer and a spunlace non-woven fabric layer, and the super absorbent non-woven fabric layer and the spunlace non-woven fabric layer are stacked one above the other.

10. The dressing for improving extensibility according to claim 8, characterized in that: The planar shape of the liquid suction unit (220) may be circular, square, rhombus, triangle or hexagonal.

11. The dressing for improving extensibility according to claim 8, characterized in that: The extensibility-enhancing dressing further comprises a foam layer (400), The foam layer (400) is disposed between the liquid absorbing layer (200) and the contact layer (300). The plurality of cuts (210) penetrate the foam layer (400) along the stacking direction, so that the foam layer (400) forms a plurality of mutually independent foam units, and the foam units can be separated from each other.

12. The dressing for improving extensibility according to claim 8, characterized in that: The extensibility-enhancing dressing further comprises a protective layer, The protective layer is arranged at the bottom of the contact layer (300), and the protective layer is bonded to the contact layer (300).

13. A dressing preparation process for manufacturing a dressing with improved extensibility as claimed in any one of claims 1 to 12, characterized in that: The following steps are involved: Step 1: stacking a super absorbent non-woven fabric layer and a spunlace non-woven fabric layer to form a liquid-absorbing layer (200); Step 2: placing the liquid absorbing layer (200) on a cutting platform and conveying it to a cutting roller group, and using a cutter on the cutting roller group to cut the object to be cut, thereby forming a plurality of liquid absorbing units (220) that are independent of each other and can be separated from each other in the liquid absorbing layer (200); Step 3: laminating the film layer (100), the cut liquid-absorbing layer (200), the contact layer (300) and the protective layer together to form a multi-layer dressing material; Step 4: Cut and package the formed multi-layer dressing raw materials to form a dressing product with improved ductility.

14. The dressing preparation process according to claim 13, characterized in that: In the second step, the liquid absorbing layer (200) and the foam layer (400) are bonded to each other in the object to be cut.

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