JP2021094396A - Nonwoven fabric dressing, nonwoven fabric dressing pad, and use thereof - Google Patents

Abstract

To provide a nonwoven fabric dressing that is capable of being used for wounds and surgical sites of a wider treatment range and has higher effectiveness and safety as compared with conventional gauze and normal nonwoven fabric dressings.SOLUTION: A nonwoven fabric dressing 10 includes a single layer of spunlace nonwoven fabric, the nonwoven fabric dressing having a surface S11 that is rough and has a three-dimensional texture and a bottom surface S12 that is smooth. The three-dimensional texture of the surface of the nonwoven fabric dressing is suitable for cleaning of wounds, preparations for surgery, and debridement. The smooth bottom surface is suitable for treatment of sensitive wounds or skin. Actually, the nonwoven fabric dressing is a new nonwoven fabric dressing obtained by combining most advantageous characteristics of a conventional gauze dressing (having a surface with a texture and high tear resistance) and a normal nonwoven fabric dressing (having an adhesion prevention surface that has high water absorbency, hardly generates cotton dust, and is smooth).SELECTED DRAWING: Figure 1

Description

The present invention is a new type of disposable spunlaced non-woven dressing that combines all the advantageous properties of conventional gauze dressings with conventional non-woven dressings. Due to its properties, the dressings of the present invention are more general and effective than conventional dressings used in wound care and / or surgery.

In general wound care and medical processes such as surgery related to incision, conventional dressings are used for absorption of blood and body exudates and for cleaning wounds. In the conventional dressing, the dressing is not impregnated with a drug or other substance. High-grade dressings, on the other hand, are those in which the dressing is impregnated with drugs or other substances. Currently, there are mainly two types of conventional medical dressings, (woven fabric) gauze dressing and non-woven fabric dressing (nonwoven fabric). In non-woven dressings, the non-woven material is made of spunlace non-woven fabric made of rayon, polyester or cotton fibers. Of these two types of dressings, gauze dressings are more commonly used because they are more suitable for use in wound care and surgery. With the use of non-woven dressings, surgical dressings require higher strength and tear resistance, which is lacking in regular non-woven dressings.

The main benefits of dressings made with gauze are: (1) Appropriate water absorption capacity for wounds with large amounts of blood or body secretions; (2) Rough surfaces for cleaning and debris (Caused by yarn); (3) Relatively high tensile strength: Has higher fracture resistance in use. On the other hand, its main disadvantages are as follows: (1) High labor contact when making open edges and gauze sponges generally causes lint, loose threads and other contamination on the gauze fabric. (2) Relatively low absorption due to the open mesh and the need for large amounts of gauze sponge to absorb blood and other exudates; (3) The cost of producing gauze remains high Gauze production costs continue to rise as wages soar in most gauze-producing countries around the world.

Ordinary non-woven dressings were introduced into the medical field by Johnson & Johnson (J & J) in the late 1980s, the purpose of which is to replace gauze dressings. These non-woven dressings are made of spunlaced non-woven fabrics and are a mixture of 70/30 weight ratio rayon / polyester. It should be noted that J & J style non-woven dressings are generally referred to as ordinary non-woven dressings. Due to its ease of manufacture and increasing automation, the cost of non-woven spunlace fabrics is lower than that of machine-made fabrics. Non-woven dressings also have the following advantages over gauze: low lint levels, no loose silk, no scratches and high absorbency. However, ordinary non-woven dressings have low tensile strength in the crossing direction of the fabric and therefore have low tear strength and are not suitable for surgical use. Also, all medical non-woven dressings currently on the market have a slight texture and a smooth surface. In the process of manufacturing the spunlace non-woven fabric, the texture is formed by placing a mesh (generally made of stainless steel) having a vertical and horizontal crossing pattern (a vertical and horizontal crossing pattern of silk thread of gauze dressing). At the final step of the spunlace non-woven fabric production line, before the high pressure spray step, the mesh is placed on a wet fiber bed and the fiber winding step produces the non-woven fabric by simultaneously creating a vertical and horizontal crossing pattern. However, this model is a two-dimensional (2D) property and is generally considered not to be rough enough for wound debride. Therefore, conventional non-woven dressings are used only for low-end medical applications.

In about 2008, it was tried to make a spunlace non-woven fabric using cotton fibers, and a non-woven cotton dressing was made to have higher tensile strength and used in the surgical field. However, its use in the medical field is limited due to the higher strength and higher cost of non-woven cotton dressings than traditional gauze dressings. Also, non-woven cotton dressings have a light textured surface, the roughness of which is much lower than gauze dressings. Therefore, non-woven cotton dressings are not considered suitable for wound cleaning and debridement that require a rough surface.

From the above, an object of the present invention is to provide a new type of non-woven fabric dressing, whereby the advantageous properties of a conventional gauze dressing and a normal non-woven fabric dressing can be combined into one dressing.

Contents of the invention

It is an object of the present invention to provide (1) a new type of non-woven dressing; (2) aseptic packaging of a new type of non-woven dressing; (3) use of a new type of non-woven dressing.

In order to achieve the above object, the present invention is as follows.
A non-woven fabric dressing containing at least one layer of spunlaced non-woven fabric, wherein the surface of the non-woven fabric dressing is rough and has a three-dimensional texture, and the bottom surface of the non-woven fabric dressing is smooth.

Of these, the surface and smooth bottom of the three-dimensional texture are formed by spraying onto a pre-patterned mesh using a high pressure water jet, which is the material for the spunlace production line conveyor belt. Placed on the fiber.

Among them, the non-woven fabric is made of 100% rayon, viscose, polyester, cotton and bamboo fibers, or a mixture of these fibers.

Among them, the weight of the non-woven fabric used for manufacturing the non-woven dressing is 30 g to ^{130 g per 1 m 2} , the tensile strength in the vertical and horizontal directions of the fabric is all 15 N or more, and the test method is used for a sample fabric of 5 cm × 10 cm. The test is performed with a cross-head tensile tester at a speed of about 20 cm / min.

Among them, the three-dimensional texture surface contains a bump-shaped pattern pre-designed on the non-woven fabric.

Among them, the bump shape on the surface of the three-dimensional texture is a general shape including a sphere, a pyramid, an ellipse, a triangle, a rectangle, a rectangle, and a rhombus.

Among them, the height of the bump on the surface of the three-dimensional texture is 0.1 to 1.0 mm.

Among them, the width of the developed size is 2 to 100 cm, the length is 2 to 200 cm, and the number of layers is 1 to 16.

Among them, one or more non-woven dressings are enclosed in one sealed bag or box.

Of these, the non-woven dressing is used for wound care and / or surgery.

The effects of the present invention are as follows. Traditional gauze dressings (having textured surfaces and high tear resistance) and regular non-woven dressings (high water absorption, low lint content, smooth), such as rough three-dimensional textured surface and smooth bottom surface, and higher tensile strength in the fabric. It is a new type of non-woven dressing that combines the most advantageous properties of (having a smooth surface and adhesive resistance). Therefore, the non-woven dressing of the present invention and its non-woven dressing pad can be used for a wider range of wounds and surgical sites, and are more effective and safer to use in wound care and surgery than conventional gauze and ordinary non-woven dressing. is there.

It is a structural drawing of the new type non-woven fabric dressing example of this invention. This structural drawing shows a three-dimensional textured surface that projects perpendicular to the surface S11 and a smooth, flat bottom surface S12. It is sectional drawing of the Example of the new type non-woven dressing pad. It includes a sealed bag or a sealed box 20 and can surround one or more new non-woven dressings 10.

Based on extensive research and experimental research, the present inventor has found two main requirements for improving the performance of non-woven dressings. (1) By improving its tensile strength, the tear resistance is increased to at least 15N. This can be achieved by using fiber cloth wraps in the non-woven fabric manufacturing process or by increasing the water jet pressure used to wind the fiber nets in spunlace technology. (2) The surface roughness of the non-woven fabric is improved to be close to that of gauze dressing. These new non-woven dressings have a rougher surface and higher tensile strength, and at the same time can maintain the good properties of the non-woven dressing and can be used in various wound healing and surgical related applications.

The new non-woven fabric dressing, the non-woven fabric dressing pad, and their uses will be described in detail with reference to preferred examples of the non-woven fabric dressing, FIGS. 1 and 2. These new dressings include at least one layer of spunlaced non-woven fabric, the surface of the non-woven fabric dressing is rough and has a three-dimensional texture, and the bottom surface thereof is smooth.

As shown in FIG. 1, an embodiment of the present invention is a non-woven fabric dressing 10, of which the non-woven fabric dressing 10 has a single layer of spunlaced non-woven fabric, of which the non-woven fabric dressing 10 has a rough three-dimensional textured surface S11. Among them, the bottom surface S12 is smooth. That is, since the surface S11 of the non-woven fabric dressing 10 has a three-dimensional texture, the roughness of the surface S11 is improved and the surface of the surface S11 is roughened. On the other hand, since the bottom surface S12 is not provided with a three-dimensional texture that affects the surface smoothness, the bottom surface S12 is smooth. According to the embodiment of the non-woven fabric dressing 10 of the present invention, the non-woven fabric dressing 10 has one layer of spunlaced non-woven fabric. Among them, the feature of the non-woven fabric dressing 10 is that the surface of S11 is rough, it has a three-dimensional texture, and the bottom surface S12 is smooth. Among them, the rough surface S11 is to improve the cleaning and debridement ability of the non-woven dressing 10. Of these, the flat and smooth bottom surface S12 is very suitable for patients with sensitive wounds or skin. In fact, the non-woven dressing 10 of the present invention is a conventional gauze dressing (having a textured surface S11 and a high tear resistance) and a normal non-woven dressing (having high water absorption, less likely to generate cotton dust, and smooth). This is a new type of non-woven dressing 10 that combines the most advantageous properties of the anti-adhesion surface. Due to these advantageous features, the invented non-woven dressing 10 can be used in the treatment of various wounds and is more expensive in wound care and surgery related applications compared to traditional gauze and conventional non-woven dressings. Has efficacy and safety.

It has been found that providing a three-dimensional texture on the surface S11 of the non-woven dressing 10 is the best way to provide a high roughness to the non-woven dressing. The three-dimensional texture can be formed without changing the position in the manufacturing process of the spunlace non-woven fabric. In this process, a mesh with a pre-designed pattern, usually made of stainless steel, is placed on a wet fiber net (this is the final step in the non-woven fabric manufacturing process). When the high pressure jet acts on the fibers and the fibers are entangled to form a non-woven fabric, the protrusions of the fibers form a three-dimensional texture pattern on the surface S11 and at the same time form a smooth bottom surface S12. Using a high quality spunlace non-woven production line ensures that the spunlacing techniques for these 3D texture patterns are properly controlled and reliable.
And

100% rayon (sometimes referred to as viscose), polyester, cotton or bamboo fibers, or a mixture of these fibers so that the non-woven dressing 10 has a three-dimensional texture pattern surface S11 and a smooth bottom surface S12. It is possible to form a non-woven fabric. In general, rayon is a preferred material because of its softness, high water absorption, environmental protection and low material cost. In this embodiment, the weight of the non-woven fabric used for producing the non-woven dressing is 30 g to 130 g per ^{1 m 2.} The tensile strength of the dough in the vertical and horizontal directions is 15 N or more, and as a test method thereof, a test is performed on a sample dough of 5 cm × 10 cm at a speed of about 20 cm / min with a crosshead tensile tester. The three-dimensional textured surface contains a pre-designed bump-shaped pattern on the non-woven fabric. The bump shape on the surface of the three-dimensional texture is a general shape including a three-dimensional shape such as a sphere, a pyramid, an ellipse, a triangle, a rectangle, a rectangle, and a rhombus. The height of the bumps on the surface of the three-dimensional texture is 0.1 to 1.0 mm. The unfolded size of the non-woven dressing has a width of 2 to 100 cm, a length of 2 to 200 cm, and a number of layers of 1 to 16. These new non-woven dressings 10 can be placed in a sealed bag or box, and after being disinfected, form a sterilized bag containing one or more non-woven dressings 10. Nonwoven dressing 10 is used in related applications such as wound care and / or surgery

Through extensive research, we have discovered important elements in order to produce non-woven fabrics with obvious three-dimensional textured surfaces.

(1) Weight of non-woven fabric The weight of the non-woven fabric is generally indicated by (g / m ² , GSM). The three-dimensional texture surface structure is a bump of a non-woven fabric fiber extruded from a non-woven fabric base material by a water jet in the process of forming a non-woven fabric having a three-dimensional texture. When the non-woven fabric is a low-weight, light material, there are few fibers that can be extruded upward to form bumps and a three-dimensional textured surface pattern on the non-woven fabric. Generally, the weight of the non-woven fabric is required to be at least 30 GSM in order to form the three-dimensional textured surface structure.

(2) The height roughness of the bumps on the surrounding base material is determined by the height of the three-dimensional texture bumps. Generally, the higher the bumps and the more obvious, the higher the roughness.

(3) Fiber used in the production of the non-woven fabric The roughness of the non-woven fabric is determined by the type of fiber used in the production of the non-woven fabric. Usually, by using rayon spunlace fabric, a three-dimensional textured surface can be easily obtained. This is because the fibers of the rayon spunlace fabric are more flexible than other types of fibers.

(4) Pressure of the water jet used for winding the non-woven fabric net The pressure level of the spunlace production line needs to be set close to the highest level. This makes it possible to extrude the bumps to form a three-dimensional texture pattern and at the same time cause the fibers required to form the non-woven fabric to be wound up.

(5) Tensile strength of fabric In order to roughen the three-dimensional texture surface, the non-woven fabric base material needs a certain strength that is neither too soft nor too weak. The tensile strength of the non-woven fabric needs to be 15 N or more, and the test method is to perform a test on a sample fabric of 5 cm × 10 cm at a speed of about 20 cm / min with a crosshead tensile tester.

(6) Cross Wrap of Fabric In order to improve the tensile strength of the non-woven fabric, when forming the spunlace non-woven fabric, the cross wrap of fibers is usually preferable to the direct wrap of fibers.

(7) Types of three-dimensional patterns On the surface of the three-dimensional texture, it is necessary to design in advance an overlapping pattern in which the shape of the non-woven fabric material protrudes from the bottom of the surrounding fabric base material. The height of the bump 101 is 0.1 to 1.0 mm. The shape of the bump is any one of the general shapes selected from the group consisting of spheres, pyramids, ellipses, triangles, rectangles, rectangles, rhombuses and other three-dimensional patterns.

Another object of the present invention is to form a smooth bottom layer on the spunlaced nonwoven fabric in addition to the three-dimensional textured surface of the nonwoven fabric surface. It should be noted that in the process of manufacturing the spunlace non-woven fabric, the bottom surface S12 of the fabric and the three-dimensional surface S11 of the fabric are formed at the same time. The important elements are as follows.

(1) Weight of dough Usually, it is expressed in g / m ² and GSM. When the non-woven fabric is a low-weight and light material, the bumps on the top layer are dented on the bottom surface S12. Therefore, the weight of the non-woven fabric must be at least 30 gsm, which makes it possible to form a flat and smooth bottom surface S12 according to the three-dimensional texture surface structure of the surface.

(2) Fibers Used for Producing Nonwoven Fabrics In ordinary fibers, a combination of a smooth bottom surface S12 and a three-dimensional textured surface S11 can be easily obtained in a non-woven fabric made of rayon fiber rather than cotton and polyester.

(3) Water jet pressure used for winding the non-woven fabric net In order to form a flat and smooth bottom surface S12 layer, the fibers need to be firmly pressed against the conveyor belt of the span lace production line. Therefore, the pressure on the span lace production line should be set close to the highest level.

(4) Types of 3D texture pattern It was found that the height of bumps on the surface of the 3D texture has a certain effect on the flatness and smoothness of the bottom layer of the spunlaced non-woven fabric. For higher bumps, especially for lightweight fabrics, the recess pattern on the bottom surface S12 is more pronounced. Therefore, even in the case of a thick non-woven fabric, the height of the bump should not exceed 1 mm.

Another object of the present invention is that a non-woven dressing made of a three-dimensional textured non-woven fabric retains the typical advantages of a conventional non-woven sponge. That is, it has (A) high water absorption, (B) low cotton level, and (C) soft touch. Regarding (a) water absorption, the water absorption rates of a sponge made of a three-dimensional textured non-woven fabric and a sponge made of a normal two-dimensional textured non-woven fabric were compared. In the water absorption test, the dry sponge (W1) is first weighed, the sponge is submerged in water for at least 10 seconds, and then removed from the water for 30 seconds (or until the water droplets on the wet sponge stop). Wet weight (W2) was measured. The water absorption rate is (W2-W1) / W1. From the water absorption study, it was obtained that the water absorption rate of the non-woven sponge was not affected by the three-dimensional texture surface and was higher than that of the cotton woven sponge. (B) In the cotton level measurement, a friction test was performed on the dry sponge fabric with a black glass panel. After rubbing the dough with the glass panel for 30 seconds, observing the black glass panel makes it easy to see the wool that has fallen from the sponge. The measurement results are as follows. Wool did not fall from the non-woven sponge made of the three-dimensional textured non-woven sponge. On the other hand, it was confirmed on the black glass panel that a large amount of wool had fallen from the sponge made of gauze sponge. (C) Regarding the soft tactile sensation, the tactile sensation of the three-dimensional textured non-woven fabric and the tactile sensation of the normal two-dimensional textured non-woven fabric were compared. There was no obvious difference in their softness, but the bumps on the surface made the 3D textured non-woven fabric coarser than the 2D textured non-woven fabric.

Hereinafter, measurement studies performed on the non-woven fabric dressing 10 of the present invention including the three-dimensional textured surface of the surface S11 and the smooth surface of the bottom surface S12 will be described. These measurement results prove that the non-woven dressing of the present invention fulfills the object of the present invention.

As shown in FIG. 2, in this embodiment, one pack of non-woven fabric dressing 10 is one or a plurality of non-woven fabric dressings 10 enclosed in one sealed bag or box 20. The sealed bag or box 20 is used for purposes such as sterilization and prevents the non-woven dressing 10 from being contaminated.

It should be noted that the new non-woven dressing 10 is more suitable for a wider range of wound care and surgery related applications than conventional gauze and conventional non-woven dressings. In wound care applications, it can be used in applications related to wound care such as debridement, preparation, cleaning, buffering and treatment of sensitive wounds. In surgical applications, it can be used in surgical applications such as absorption, wiping, buffering, organ protection, etc. of available blood and other body exudates.

The present invention provides a new type of non-woven dressing, a new type of non-woven dressing pad and its use, wherein the new non-woven dressing includes one layer of spunlaced non-woven fabric, the surface of the non-woven fabric dressing has a rough three-dimensional texture, and the bottom surface thereof is smooth. Is. Although the present invention has been described in detail using preferred embodiments for illustration, the alternatives, modifications, and modifications made in the light of the detailed description will be apparent to those skilled in the art. The present invention is intended to include everything within the spirit of the claims and examples. Equivalent structural transformations made by using the specification and drawings of the present application or direct / indirect application in the technical field related to the present invention are included in the scope of patent protection of the present invention.

Claims (10)

A non-woven dressing containing a single layer of spunlaced non-woven fabric.
A non-woven fabric dressing characterized in that the surface of the non-woven fabric dressing is rough and has a three-dimensional texture, and the bottom surface of the non-woven fabric dressing is smooth. The surface and smooth bottom of the three-dimensional texture are formed by a high pressure water jet sprayed onto a mesh with a pattern.
The non-woven dressing according to claim 1, wherein the mesh is placed on a material fiber. The non-woven fabric dressing according to claim 1, wherein the non-woven fabric is made of a kind of rayon, viscose, polyester, cotton and bamboo fibers, or a mixture of these fibers. The invention according to any one of claims 1 to 3, wherein the weight of the non-woven fabric is 30 g to ^{130 g per 1 m 2} , and the tensile strengths of the non-woven fabric in the vertical and horizontal directions are all 15 N or more. Non-woven dressing that has been. The non-woven dressing according to claim 2 or 4, wherein the surface of the three-dimensional texture includes a bump-shaped pattern. The non-woven dressing according to claim 5, wherein the bump-shaped pattern is arranged so as to form a pre-designed pattern. Claim that the shape of the bump is any one general shape selected from the group consisting of spheres, pyramids, ellipses, triangles, rectangles, rectangles, rhombuses and other three-dimensional patterns. The non-woven dressing according to 5 or 6. The non-woven dressing according to any one of claims 5 to 7, wherein the bump height is 0.1 to 1.0 mm. The non-woven fabric according to any one of claims 1 to 8, wherein the width of the non-woven fabric dressing is 2 to 100 cm, the length is 2 to 200 cm, and the number of layers is 1 to 16. dressing. The non-woven fabric dressing according to any one of claims 1 to 9, wherein one or a plurality of non-woven fabric dressings are enclosed and stored.

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