CN114366442A - Non-woven fabric wound dressing, dressing bag and application thereof - Google Patents

Abstract

The invention discloses a non-woven wound dressing, a dressing pack and applications thereof, wherein the non-woven wound dressing comprises a multi-layer viscose-based non-woven fabric, and the multi-layer viscose-based non-woven fabric comprises at least one interlayer unit, Each interlayer unit includes two layers of viscose-based non-woven fabrics; each layer of viscose-based non-woven fabrics has opposite smooth surfaces and rough surfaces, and three-dimensional reliefs are formed on the rough surfaces; the two layers of viscose-based non-woven fabrics of each interlayer unit In the glue-based non-woven fabric, the smooth surface of the upper layer of viscose-based non-woven fabric and the smooth surface of the lower layer of viscose-based non-woven fabric face outward, and the rough surface of the upper layer of viscose-based non-woven fabric and the lower layer of viscose-based non-woven fabric are facing outward. The rough surfaces face inward and face each other, so that an air interlayer is formed between the upper layer of viscose-based nonwoven fabric and the lower layer of viscose-based nonwoven fabric. The wound dressing of the present invention is bulky, flexible and thick, in addition, the highly absorbent, lint-free, smooth and non-stick surface layer of the wound ensures greater efficiency and comfort when treating the wound and removing the dressing .

Description

Non-woven wound dressing, dressing pack and application thereof

technical field

The invention relates to medical dressings, in particular to a non-woven wound dressing, a dressing pack and applications thereof.

Background technique

Various injuries, chronic skin diseases or surgeries from all walks of life can cause wounds, so wound care products are in high demand. The size of the wound ranges from shallow wounds such as skin scratches to deep and wide wounds after major surgery such as abdominal surgery. The time it takes for a wound to heal can range from a short healing period such as a finger cut to a relatively long healing period for a chronic wound caused by a skin ulcer. Some wounds require ointment or ointment to heal better, but most wounds require only plain dressings, often referred to as "traditional wound dressings." It should also be noted that wound dressings need to be sterilized before use to prevent wound infection, and dressings should be changed regularly to prevent wound contamination and infection. Furthermore, it should be noted that wound dressings are mainly divided into two types: contact wound dressings and non-contact wound dressings. Contact wound dressings, such as traditional cotton, nonwoven or gauze dressings, are placed directly on the wound for protection. In contrast, non-contact wound dressings do not come into direct contact with the wound, but are used to wrap and wrap around the area of the patient where the contact dressing has been placed to help secure the contact wound dressing to the wound. For example, rolls of cotton bandages.

The main functions of traditional wound dressings include: (a) covering the wound to prevent infection by contamination, microorganisms, bacteria or other foreign bodies. (b) Absorb blood or exudate from the wound to promote wound healing and act as a barrier to protect clothing above the dressing from contamination by blood or exudate. (c) Can be used as an air cushion to relieve pain in wounds and their adjacent areas when accidentally bumped or bumped against a hard object. The condition can cause tremendous pain in the wound and, in some cases, even open the wound.

In order to achieve the above functions, traditional wound dressings should have the following characteristics: (1) high water absorption and rapid absorption. (2) A good barrier can prevent bacteria, microorganisms and other foreign substances from infecting the wound, but it must also be breathable and moisture permeable to promote wound healing. (3) There are no fluff or yarn ends that could contaminate the wound and cause infection. (4) Smooth surface to reduce discomfort when touching the wound. (5) High tensile strength and tear resistance, so that the dressing will not break during use. (6) The fabric is fluffy and thick, which enables it to provide excellent cushioning protection for wounds. (7) Non-stick wound to minimize pain or discomfort when the dressing is removed from the wound.

For ordinary wound dressings, most dressings are made of cotton gauze, commonly referred to as gauze dressings. Gauze dressings are woven from loose cotton yarns, which are often not sewn together at the edges in order to keep the material low cost. Gauze dressings are folded into different sizes and layers depending on the size and depth of the wound. Wounds have been treated with this cotton gauze dressing for over a hundred years. Although cotton gauze dressings are widely used and have a long history, there are a number of quality issues, including relatively low absorption, high fluff, yarn ends mainly from unsewn edges, and a particular tendency to stick to wounds that are not yet dry. In addition, the manufacture of cotton gauze dressings requires a lot of labor, so the manufacturing industry has moved to countries with low labor costs, but these countries have low levels of quality control.

For more serious wounds or chronic wounds that are difficult to heal, an advanced cotton wound dressing was developed for the treatment of these wounds in the modern 1970s. This advanced cotton wound dressing, commonly referred to as a "curved gauze" wound dressing, is made from a special cotton gauze with stitched edges, making it softer and thicker. Its gauze is washed and dried to create a wrinkled structure while washing away as much lint and yarn ends as possible. "Curved gauze" wound dressings have better pad performance and other safety-enhancing properties and are now considered an advanced product in cotton wound dressings. They are often used to treat wounds such as burns and ulcers, which are characterized by extensive exudate, relatively painful, and sensitive skin. However, they are only used to treat some specific wounds and are limited to more developed countries because: (a) their cost is high, three times the cost of ordinary cotton gauze dressings, (b) in most countries their high cost The cost makes them unsuitable for treating severe wounds, let alone mild ones.

To replace cotton gauze wound dressings, Johnson & Johnson developed a new type of wound dressing in the 1970s, made of a spunlace nonwoven made of a blend of rayon and polyester fibers. They are commonly referred to as nonwoven dressings. Compared with traditional cotton yarn wound dressings, non-woven dressings are softer, more absorbent, less fuzz, no yarn ends, and less adhesive to wounds. Due to the lower cost of raw materials and a higher degree of automation of the production process, its cost is also lower. However, the use of nonwoven dressings is still not as common as cotton gauze dressings. Despite its lower cost and superior performance, non-woven dressings are currently used around the world to treat only minor wounds. A major problem is that current nonwoven dressings are fragile because they are not bulky and have low tensile strength along the direction of the nonwoven dressing. Fragile non-woven dressings can roll up especially when used to wipe wounds. Therefore, non-woven dressings are not suitable for treating more severe or chronic wounds, which often require cleaning and debridement.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the purpose of the present invention is to provide a non-woven wound dressing, a dressing pack and its application.

In order to achieve the above object, on the one hand, the non-woven wound dressing according to an embodiment of the present invention includes:

A multi-layer viscose-based non-woven fabric, the multi-layer viscose-based non-woven fabric includes at least one interlayer unit, and each of the interlayer units includes two layers of viscose-based non-woven fabric;

Wherein, each layer of the viscose-based non-woven fabric has opposite smooth surfaces and rough surfaces, and three-dimensional reliefs are formed on the rough surface; the two layers of viscose-based non-woven fabrics in each sandwich unit , the smooth surface of the upper layer of viscose-based non-woven fabric and the smooth surface of the lower layer of viscose-based non-woven fabric face outward, and the rough surface of the upper layer of viscose-based non-woven fabric and the rough surface of the lower layer of viscose-based non-woven fabric face inward and mutually face each other so that an air interlayer is formed between the upper layer of viscose-based non-woven fabric and the lower layer of viscose-based non-woven fabric.

In addition, the non-woven wound dressing according to the above embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the smooth surface and the rough surface are formed by spraying a predetermined pressure water jet onto the fiber web and the supporting web curtain under it and reflecting it multiple times.

According to an embodiment of the present invention, the viscose-based non-woven fabric is made of one or more of viscose fibers, polyester fibers, and bamboo fibers.

According to an embodiment of the present invention, the weight of the viscose-based nonwoven fabric is between 50 g/m2 and 130 g/m2, and the viscose-based nonwoven fabric is in the machine direction and the cross direction thereof. The tensile strength is not less than 25 Newtons.

According to an embodiment of the present invention, the three-dimensional relief includes a plurality of protrusions arranged on the rough surface, and the plurality of the protrusions are arranged in a pre-designed pattern.

According to an embodiment of the present invention, the protrusion is any one of a hemisphere, a pyramid, a semi-ellipse, a tetrahedron, a cube, a cuboid, and an octahedron.

According to an embodiment of the present invention, the height of each of the protrusions ranges from 0.05mm to 1.0mm.

According to an embodiment of the present invention, the non-woven wound dressing has a width ranging from 2 cm to 100 cm and a length ranging from 2 cm to 600 cm.

According to one embodiment of the present invention, the non-woven wound dressing consists of a sheet of non-woven substrate folded along itself at least once to form at least two layers of viscose-based non-woven.

According to an embodiment of the present invention, the non-woven wound dressing is formed by laminating multiple sheets of non-woven substrates together to form at least two layers of viscose-based non-woven fabrics, which are used as contact wound dressings or non-contact wound dressings dressing.

According to one embodiment of the present invention, the multi-layer viscose-based non-woven fabric is rolled up to make a bandage roll, which is used as a non-contact wound dressing.

On the other hand, a non-woven wound dressing package according to an embodiment of the present invention includes:

One or more non-woven wound dressings as described above;

A package, wherein the package is a sterilization bag, a blister pack or a sterilization box that is sealed after the non-woven wound dressing is packed.

In yet another aspect, the embodiments of the present invention also provide the above non-woven wound dressings, which are used as contact wound dressings or non-contact wound dressings, cosmetic or incontinence cosmetic wipes, wipes, towels, and newborns. or other patients' blankets.

The non-woven wound dressing provided according to the embodiment of the present invention has an air interlayer, which is more fluffy, flexible and thick. Compared with the traditional dressing, it has less fluff, less adhesion to the wound, more water absorption, and faster water absorption. quick. In addition, it has a smooth surface, and scratches the wound and skin relatively lightly, and the air interlayer can provide similar air cushion protection during wound treatment, which can be applied to treat a variety of wounds, including more serious wounds, And it's cheap.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

Fig. 1 is the structural representation of viscose-based non-woven fabric according to the embodiment of the present invention;

Fig. 2 is the side partial enlarged schematic diagram of the side surface of viscose-based non-woven fabric according to the embodiment of the present invention;

Fig. 3 is the structural representation of 2 layers of wound dressings according to the embodiment of the present invention;

4 is a cross-sectional view of a 2-layer wound dressing according to an embodiment of the present invention;

5 is a schematic structural diagram of a four-layer wound dressing according to an embodiment of the present invention;

6 is a cross-sectional view of a 4-layer wound dressing according to an embodiment of the present invention;

Fig. 7 is the structural representation of the bandage roll made from the viscose-based non-woven roll according to the embodiment of the present invention;

8 is a cross-sectional view of a non-woven wound dressing pack in an embodiment of the present invention.

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention. Based on the embodiments of the present invention, those of ordinary skill in the art do not make any creative work premise. All other embodiments obtained below belong to the protection scope of the present invention.

The present invention is accomplished by the inventors based on the following discoveries and researches:

The main purpose of the present invention is to provide a non-woven wound dressing 100, which can be suitable for treating various wounds ranging from mild wounds to the most serious wounds (eg, burns) or chronic wounds (eg, skin ulcers). Wound dressings for the treatment of mild wounds do not need to have the best performance, the main concern for the user is its cost. In contrast, wound dressings for the treatment of more severe wounds require the highest quality and best performance, and cost is no longer a major concern because: (1) severe wounds are prone to infection, and (2) severe wounds can Profuse exudate, (3) severe wounds and adjacent skin are very painful and very sensitive to touch and other physical contact, (4) severe wounds require more frequent cleaning, and dressings must be changed each time the wound is cleaned.

In order to properly protect serious wounds, the preferred wound dressing needs to have the following properties: (a) highly absorbent and fast absorbing, (b) non-villi, non-scratching and non-adhering wounds, (c) a flexible smooth surface , so that the wound dressing does not cause discomfort or pain during application and removal, (d) is highly breathable, allowing air to pass through easily, and has no holes to prevent viruses, bacteria or foreign objects from passing through the dressing and infecting the wound, (e) ) is fluffy, thick and provides superior air cushion protection throughout use. At present, neither traditional cotton dressings nor non-woven dressings have all the above properties.

As with traditional cotton wound dressings, "curved gauze" wound dressings are generally considered to be in the advanced category of dressings. Unlike normal traditional category cotton dressings, this advanced cotton dressing has stitched edges and is washed and dried so that its fuzz level is much lower than normal cotton gauze dressings. In addition, the warped, shrunken structure created during the washing and drying process makes the dressings bulkier, heavier, and more absorbent than regular cotton gauze dressings. "Twisted gauze" wound dressings include two types: (a) rolls for covering and protecting larger wounds, or for wrapping non-contact dressings around contact dressings; (b) for covering and protecting Contact dressings for smaller size wounds. Overall, the "curved gauze" wound dressing outperformed conventional traditional cotton gauze dressings. However, some properties of "curved gauze" wound dressings cannot be further improved due to the nature of its material and the limitations of the manufacturing process, including: (1) the increase in bulk (i.e. thickness) is limited and cannot be easily changed, ( 2) Due to the structural characteristics of cotton gauze, the surface of the dressing is not smooth, which makes the dressing scratch the skin and adhere to the wound. (3) The "curved gauze" wound dressing has a large mesh, which cannot prevent viruses Or bacteria pass through the mesh and infect the wound, so it cannot provide the best protection for the wound. (4) Although the "curved gauze" wound dressing has better absorbency, water absorption speed, fluff and softness than conventional traditional cotton dressings, But these properties are still far lower than conventional traditional non-woven dressings. (5) The cost of "curved gauze" wound dressings is very high, about 3 times that of conventional cotton gauze dressings. Therefore, "curved gauze" wound dressings Dressings are limited to a small number of wound care applications in most developed countries and are not used in most other countries.

As for non-woven wound dressings, the most commonly used are contact dressings (10cm x 10cm, 4 layers), which are made of spunlace non-woven fabrics mixed with rayon and polyester fibers. Such contact dressings are generally referred to as "nonwoven dressings". The non-woven fabric used to make the non-woven dressing has a weight in the range of 30 to 40 grams per square meter (gsm), and the surface of the cloth is smooth and smooth. The tensile strength of the spunlace nonwoven fabric is about 20 Newtons in the machine direction (MD) and less than 10 Newtons in the transverse direction (CD). The lower the tensile strength in the cross direction (CD), the easier the nonwoven is to stretch and the softer the hand. If a nonwoven fabric needs to be made thicker, there are two options: (a) increase the weight per square meter of the nonwoven fabric or (b) increase the tensile strength. However, either option will make the nonwoven feel stiff and lose its softness. For example, when the non-woven fabric weighs 80 g/m2 and the tensile strength in both directions of the fabric exceeds 40 N, the non-woven fabric feels like a piece of paper. Another property of nonwoven dressings that needs improvement is their bulk. For cotton gauze dressings, there are two options for increasing the volume: (a) increase the number of layers of the dressing so that it has more layers (b) make a single layer of cotton gauze like a "curved gauze" wound dressing become thicker. Note that the cotton gauze used to make the "curved gauze" wound dressing is a thicker gauze that is spun from a smaller yarn count and thus thicker yarn. The "curved gauze" also requires a special washing/drying pretreatment process, which makes the originally smooth gauze pile wrinkled to increase the bulkiness of the cotton gauze. It should also be noted that the above two methods for improving the bulkiness of "curved gauze" wound dressings are not suitable for traditional non-woven fabrics, because: (a) increasing the number of layers of the wound dressing will increase the cost of raw materials , (b) Due to the limitation of the manufacturing process of non-woven dressings, the maximum number of layers of non-woven dressings is only 8 layers, (c) The special washing/drying process will damage the spunlace non-woven fabrics and cannot be used for Manufacture of non-woven wound dressings.

Since it is not possible to convert current nonwovens into advanced nonwoven dressings with all the properties required of advanced nonwoven dressings, a special type of nonwoven must be used for manufacturing Advanced nonwoven dressings provide a new platform. After extensive research, the inventors decided to use a special type of spunlace nonwoven with three-dimensional structure and contours, which is suitable as a base material for making advanced nonwoven dressings. Notably, this three-dimensional spunlace nonwoven has never been used to make wound dressings before.

1 to 8 , a non-woven wound dressing 100 provided according to an embodiment of the present invention includes a multi-layer viscose-based non-woven fabric 10, and the multi-layer viscose-based non-woven fabric 10 includes at least one interlayer unit , each of the sandwich units includes two layers of viscose-based non-woven fabrics 10 .

Each layer of the viscose-based non-woven fabric 10 has opposite smooth surfaces S10 and rough surfaces S11, and three-dimensional reliefs are formed on the rough surface S11; In the cloth 10, the smooth surface S10 of the upper layer viscose-based non-woven fabric 10 and the smooth surface S10 of the lower layer viscose-based non-woven fabric 10 face outward, and the rough surface S11 of the upper layer viscose-based non-woven fabric 10 and the lower layer viscose-based non-woven fabric 10 are not. The rough surfaces S11 of the spun fabric 10 face inward and face each other, so that an air interlayer P10 is formed between the upper layer viscose-based nonwoven fabric 10 and the lower layer viscose-based nonwoven fabric 10 .

That is to say, the non-woven wound dressing 100 is a multi-layer structure, and the multi-layer structure includes at least one interlayer unit, and the interlayer unit is composed of two upper and lower layers of viscose-based non-woven fabrics 10, and the upper layer of viscose-based non-woven fabric The smooth surface S10 of the spun fabric 10 and the smooth surface S10 of the lower layer viscose-based non-woven fabric 10 face outward, and the rough surface S11 of the upper layer viscose-based non-woven fabric 10 and the rough surface S11 of the lower layer viscose-based non-woven fabric 10 face inward and face each other, so that an air interlayer P10 is formed between the upper layer of viscose-based non-woven fabric 10 and the lower layer of viscose-based non-woven fabric 10. This air interlayer P10 can increase the thickness and volume of the wound dressing, and make the wound. The dressing is more flexible and absorbent.

The non-woven wound dressing 100 provided according to the embodiment of the present invention has an air interlayer P10, which is more fluffy, flexible and thick, compared with traditional dressings, less fluff, less adhesion to wounds, more water absorption, and water absorption faster. In addition, it has a smooth surface, and scratches the wound and skin relatively lightly, while the air interlayer P10 can provide similar air cushion protection during wound treatment, and can be applied to treat a variety of wounds, including more serious wounds , and the price is low.

The inventors have found that when making three-dimensional relief spunlace non-woven fabrics, the following parameters that control various physical properties and attributes should be considered:

(1) Tensile strength of the non-woven fabric: (a) The laying direction of the fibers on the production machine: flat, cross or semi-cross. (b) The number of fibers laid in each direction, (c) the water pressure of the high-pressure water jet.

(2) The weight of the non-woven fabric is expressed in grams per square meter: (a) The total weight of fibers laid per square meter on the production machine.

(3) The thickness of the non-woven fabric determines the bulkiness of the dressing made from it: (a) the shape of the designed relief pattern, (b) the water jet pressure of the high-pressure water jet and (c) the pressure used to make the non-woven fabric what type of fiber

(4) The number of fluff: (a) the fiber composition of the non-woven fabric, (b) the water jet pressure of the high-pressure water jet, (c) the design of the relief pattern.

(5) Water absorption of non-woven fabric: (a) fiber composition of non-woven fabric, (b) water spray pressure of high-pressure water jet, (c) weight of non-woven fabric, (d) design of relief pattern.

In one embodiment of the present invention, the smooth surface S10 and the rough surface S11 are formed by spraying a predetermined pressure water jet onto the fiber web and the supporting web curtain below it, and performing multiple reflections.

Specifically, the manufacturing process of the three-dimensional spunlace non-woven fabric is similar to that of the conventional two-dimensional non-woven fabric with a smooth surface profile. In the spunlace process, the synthetic fibers are carded and laid into a fiber web. When the high-pressure water jet in the spunlace area is sprayed onto the fiber web and the supporting web curtain below it, it is reflected back and forth for many times and passes through the fiber web, so that the synthesis of the fiber web is achieved. The fibers are interspersed, entangled, and cohesive to be reinforced, and then processed into non-woven fabrics through subsequent finishing, drying, and winding. In order to make a spunlace nonwoven with prominent three-dimensional relief on the surface, a special support screen is made of stainless steel wire mesh with a pre-designed shape and hole shape. In the spunlace process, the supporting net curtain is arranged under the synthetic fiber web, and a three-dimensional relief pattern is formed on the surface of the non-woven fabric under the puncturing action of high-pressure water jets, and the other side of the non-woven fabric forms a smooth surface S10.

The three-dimensional relief is formed by the above method, which facilitates the realization of batch automatic processing and reduces the cost, and the formed non-woven fabric with the three-dimensional relief has better water absorption and softness.

Preferably, the viscose-based non-woven fabric 10 can be made of one or more of viscose fibers, polyester fibers, and bamboo fibers.

In an embodiment of the present invention, the three-dimensional relief includes a plurality of protrusions 101 arranged on the rough surface S11, and the plurality of protrusions 101 are arranged in a pre-designed pattern. Preferably, the protrusions 101 may be any one of hemispherical, pyramidal, semielliptical, tetrahedral, cube, cuboid, and octahedral.

The non-woven fabric used in the present invention has a smooth surface on one side and a three-dimensional relief protruding from the surface of the non-woven fabric on the other side, the three-dimensional relief is composed of protrusions 101 arranged on the rough surface S11 Arranged in a pre-designed pattern. The three-dimensional relief on the surface of the three-dimensional relief non-woven fabric is usually based on the following shapes of protrusions 101: any one of hemisphere, pyramid, semi-ellipse, tetrahedron, cube, cuboid, and octahedron .

In one embodiment of the present invention, the weight of the viscose-based nonwoven fabric 10 is between 50 g/m2 and 130 g/m2, and the viscose-based nonwoven fabric 10 is in its machine direction (CD) and the tensile strength in the cross direction (MD) is not less than 25 Newtons.

As mentioned above, the lower the tensile strength of the non-woven fabric in the machine direction (CD), the easier it is to stretch the non-woven fabric and the softer the hand. If you need to make the non-woven fabric thicker, you can increase the weight per square meter of the non-woven fabric or increase the tensile strength. However, adding weight or tensile strength can make the nonwoven feel stiff and lose its softness. The inventor found through experiments that the weight of the viscose-based non-woven fabric 10 is controlled between 50 g/m2 and 130 g/m2, and the tensile strength in the machine direction (CD) and cross direction (MD) is not lower than 25 Newtons, so that the non-woven wound dressing 100 can satisfy better softness while keeping the non-woven fabric relatively thicker and fluffy, thereby meeting the performance requirements of wound accessories.

Preferably, the height of each of the protrusions 101 ranges from 0.05 mm to 1.0 mm, and the protrusions 101 of this thickness can form three-dimensional relief lines, ensuring relatively good thickness and bulkiness.

It can be understood that the width of the non-woven wound dressing 100 ranges from 2cm to 100cm, and the length ranges from 2cm to 600cm, that is, the wound dressing can be made into dressings of various sizes, and dressings of different sizes can meet different needs. wound type needs.

In one embodiment of the present invention, the non-woven wound dressing 100 is folded at least once along itself from a piece of non-woven substrate to form at least two layers of viscose-based non-woven fabric 10 .

Example 1: A sheet of nonwoven substrate is folded once on itself to form a 2-layer wound dressing with the smooth surface side on the outside and the three-dimensional relief side on the inside, which can be used as a contact Sexual wound dressings or non-contact wound dressings.

Example 2: A piece of nonwoven substrate was folded twice on itself to form a 4-layer wound dressing, which could be used as a contact wound dressing.

Example 3: A piece of nonwoven substrate was folded three times over itself to form an 8-layer wound dressing, which could be used as a contact wound dressing.

That is to say, in this embodiment, a piece of non-woven fabric can be folded one or more times to form viscose-based non-woven fabrics 10 with different layers, so as to meet the needs of different wound dressings, such as contact wounds Dressings or non-contact wounds, etc.

In another embodiment of the present invention, the non-woven wound dressing 100 is formed by laminating multiple sheets of non-woven substrates together to form at least two layers of viscose-based non-woven fabric 10 .

That is to say, in this embodiment, multiple sheets of non-woven substrates can be laminated to form a multi-layer wound dressing, for example, two layers of wound dressings can be formed by laminating two sheets of non-woven After the substrates are laminated, 4 layers of wound dressings are formed, and wound dressings with different layers are selected according to the type of wound.

It can be understood that in the multi-layer viscose-based non-woven fabric 10, the layers of the viscose-based non-woven fabric 10 do not need to be relatively fixed, and the various layers are also connected and fixed together by sewing and other processes, and there is no relative fixed. Each viscose-based nonwoven fabric 10 is relatively bulkier.

In some embodiments of the present invention, the multi-layer viscose-based non-woven fabric 10 can be rolled up to form a bandage roll, which can be used as a non-contact wound dressing, and thus can be used for wound dressing and the like.

The embodiment of the present invention also provides a non-woven wound dressing pack, including a packaging member 200 and one or more non-woven wound dressings 100 as described in the above-mentioned embodiments, and the packaging member 200 is for packing the non-woven fabric. The sterilization bag, blister pack or sterilization box sealed after the wound dressing 100.

The embodiment of the present invention also provides the non-woven wound dressing 100 as described above, which can be used as contact wound dressing or non-contact wound dressing, cosmetic or incontinence use cosmetic wipes, wipes, towels, and newborns or other patients application on the blanket.

According to the non-woven wound dressing 100 provided by the present invention, a non-woven fabric with three-dimensional relief is used, and the non-woven fabric with three-dimensional relief is compared with a conventional two-dimensional non-woven fabric with a flat shape having the same weight. , a very important feature is that the thickness of the 3D relief nonwoven is increased compared to the thickness of the flat 2D nonwoven. The thickness of the three-dimensional relief non-woven fabric is equal to the sum of the height of the relief protrusions and the thickness of the base fabric. The height of the three-dimensional relief protrusions is generally determined by the shape of the design pattern, the water pressure of the high-pressure water jet, and the type of fibers used. That is, the thickness of the base fabric is determined by the number of fibers used to make the base fabric. In general, the thickness of the base fabric of the three-dimensional relief non-woven fabric is thinner than that of the ordinary flat non-woven fabric, but when the thickness of the base fabric is added to the height of the relief, the thickness of the three-dimensional non-woven fabric is thinner than that of the flat non-woven fabric. The thickness of the non-woven fabric is thicker. How much thicker the three-dimensional relief non-woven fabric can be than ordinary flat non-woven fabrics depends on the shape of the predetermined relief pattern during production and the number of synthetic fibers distributed to both the base layer and the three-dimensional relief 101 layer.

When using the three-dimensional relief nonwoven fabric to manufacture the nonwoven wound dressing 100 of the present invention, at least two layers of the nonwoven fabric are required. In order to increase the thickness of the non-woven fabric without increasing its weight per square meter, the smooth surfaces of the two layers of wound dressings face the outside, and the surfaces of the two layers with raised 101 lines face the inside and face each other, so that the two layers of the wound dressing face The space between the opposing surface layers forms an air interlayer P10 with air cushion properties. The air interlayer P10 not only increases the volume of the wound dressing, but also makes the wound dressing of the present invention more flexible and absorbent. In addition, having the smooth side facing the outside of the wound dressing is also a key feature, which makes the dressing more comfortable when applied to the wound and the very sensitive skin around it. In addition, the smooth, lint-free surface allows the wound dressing to hardly scratch the wound and not stick to the wound; therefore, it does not cause any discomfort and pain when changing the dressing and removing it from the patient.

Double layer wound dressings can be made by folding the three-dimensional relief nonwoven over itself, with the smooth side over the outside of the dressing. If more layers are required for the wound dressing, two layers of the dressing can be folded over itself, and the operation repeated to form a four-layer dressing, an eight-layer dressing, and so on. Alternatively, by combining multiple sheets of the 2-layer wound dressing of the present invention, many layers of wound dressings with more than 2 or more layers can be made.

In general, the nonwoven dressings of the present invention can be used as contact wound dressings or non-contact wound dressings. When used as a contact wound dressing, the wound dressing of the present invention can be easily cut into any shape as desired, typically square, rectangular, circular or oval. When used as a non-contact wound dressing, the dressings of the present invention can be easily rolled up into cylinders of various widths and lengths. In addition to contact and non-contact wound care applications, the nonwoven dressings of the present invention can be used as wet wipes and towels for skin care or incontinence use, and as blankets for newborns or other patients.

The following is a comparative study on the performance and advantages of the non-woven wound dressing 100 of the present invention, "curved gauze" cotton dressing, and conventional non-woven dressings, as well as the effects of fiber composition and composition, weight per square meter on the non-woven fabric of the present invention. The characteristics of how the performance of the cloth wound dressing 100 is affected.

Study 1: Comparison of the non-woven wound dressing 100 of the present invention and a constricted gauze dressing (contact dressing)

Conclusions from Study 1 are summarized:

(A) The performance of the non-woven dressing of the present invention is better than that of the "curved gauze" dressing: (1) the water absorption is larger, the water absorption speed is faster, and (2) the thickness (ie bulkiness, volume) is much higher. , (3) higher softness, (4) the surface of the dressing has better smoothness, (5) because there are no visible pores on the three-dimensional relief non-woven dressing sheet, and many can be seen through the gauze sheet Past pores, so non-woven dressings have higher resistance to virus and bacterial penetration, and are more effective in preventing properties that lead to wound infection.

(B) The properties of the two dressings are relatively close: (1) the size of the dressing, (2) the weight of the dressing, (3) the flexibility of the dressing, and (4) the retention of shape and size after repeated extrusion.

Study 2: Comparison of the non-woven wound dressing 100 of the present invention and a constricted gauze dressing (non-contact dressing)

Summary of results from Study 2: (Note that the results for non-contact dressings (ie roll bandages) were the same as for contact dressings (ie dressing sheets).)

(A), compared with the "curved gauze" bandage roll, the non-woven dressing bandage roll of the present invention has more superior performance, including: (1) larger water absorption, faster water absorption, (2) thickness ( (3) higher softness, (4) better smoothness on the surface of the dressing, (5) because there are no visible pores on the three-dimensional relief non-woven dressing sheet, On the gauze sheet, there are obviously many pores that can be seen through, so the non-woven dressing has higher resistance to virus and bacterial penetration, and is more effective in preventing wound infection.

(B) The properties of these two kinds of dressings are relatively close: (1) the size of the dressing, (2) the weight of the dressing, (3) the flexibility of the dressing (4) the retention of shape and size after repeated extrusion.

Study 3: Comparison of non-woven dressings of the present invention with traditional gauze dressings and traditional non-woven dressings (contact dressings)

Conclusions from Study 3 are summarized:

(A), through comparison, it is found that the non-woven dressing sheet of the present invention has more superior performance than traditional gauze sheet: (1) larger water absorption, faster water absorption, (2) thickness (that is, bulkiness, volume) (3) higher softness, (4) the surface of the dressing has better smoothness, (5) because there are no visible pores on the three-dimensional relief non-woven dressing sheet, and the gauze sheet can be clearly seen There are many pores that can be seen through, so non-woven dressings have higher resistance to virus and bacterial penetration, and are more effective in preventing wound infection.

(B), compared with the traditional non-woven sheet, the non-woven dressing sheet of the present invention is more superior in the following properties: (1) higher thickness (that is, larger and more bulky), (2) each The dressing has greater water absorption and (3) higher tensile strength in both directions of the dressing.

Study 4: Nonwoven Wound Dressing 100 of the Invention (Contact):

Performance comparison of various non-woven fabrics under gram weight

Conclusions from Study 4 are summarized:

The performance of the non-woven wound dressing 100 of the present invention is not greatly affected by the weight per square meter of the non-woven fabric, except for the following properties that are directly related to the weight per square meter of the non-woven fabric:

(1) Dressing weight. The weight of the dressing increases in proportion to the weight per square meter of the nonwoven.

(2) The water absorption of each dressing sheet is proportional to its weight.

(3) The thickness of the dressing sheet is also directly related to its weight.

Study 5: Nonwoven Wound Dressing 100 of the Invention (Contact):

Performance comparison of various non-woven components

Conclusions from Study 5 are summarized:

The performance of the nonwoven wound dressing 100 of the present invention is not affected by the change in fiber composition from "70% viscose/30% polyester" to "100% viscose". In addition, the use of bamboo fibers instead of viscose fibers has no significant effect on the performance of the nonwoven wound dressing 100 of the present invention.

Based on the above research results, the inventors draw the following conclusions: the non-woven wound dressing 100 of the present invention can be made of a viscose-based non-woven fabric 10, one side of the non-woven fabric is smooth, and the other side surface is arranged with Three-dimensional raised 101 pattern slightly protruding from the surface of the non-woven fabric. The weight of the non-woven fabric must be greater than 50 grams per square meter in order to effectively produce a three-dimensional shape with protruding lines. In addition, the manufacture of nonwovens with three-dimensional relief allows the nonwovens to achieve the desired higher tensile strength and better softness in both the machine direction and the cross direction. Compared with the conventional flat non-woven fabric with only two-dimensional shape, the non-woven fabric with three-dimensional raised 101 texture can naturally enhance the bulkiness of the fabric. When the side with the protrusion 101 pattern is folded inward, a two-layer wound dressing is formed, and the space surrounding the protrusion 101 and between the surface layers of the two protrusions 101 forms an interlayer ventilation space, and further Enhances volume and bulk to the dressing. In addition, the lower density inner layer consisting of the protrusions 101 and the air interlayer P10 makes the double layer wound dressing more flexible and soft. At the same time, the two smooth surfaces of the double layer wound dressing face outward. This means that covering the wound will be a smooth, soft, non-stick dressing sheet. In addition, the non-woven wound dressing 100 of the present invention has no fluff and no yarn ends, which will make wounds more comfortable, cleaner and safer to treat with it than any existing conventional dressings of various types.

In addition, the inventor's research also provides the following conclusions: the three-dimensional relief non-woven fabric can be made of one or more of the following types of fibers: viscose fiber, polyester fiber, bamboo fiber. The weight per square meter of the non-woven fabric should be between 50 and 130 grams per square meter, and the tensile strength in the machine and cross directions of the non-woven fabric should not be less than 25 Newtons. The three-dimensional relief raised on the non-woven fabric is basically one of the following shapes: hemispherical, pyramidal, semielliptical, tetrahedron, cube, cuboid, and octahedron. The height of the relief ranges from 0.05mm to 1.0mm. The width dimension of the non-woven wound dressing 100 of the present invention ranges from 2 to 100 centimeters, and the length dimension ranges from 2 to 600 centimeters. The wound dressings of the present invention can be used as contact or non-contact wound dressings. For a two-layer nonwoven wound dressing 100, the three-dimensional relief nonwoven can be folded over itself, with the relief side folded inward and facing each other on the inside of the dressing, and the smooth side facing the dressing's Outside. For wound dressings with more layers, the 2-layer wound dressing can be folded repeatedly along itself to form 4-layer, 8-layer, etc. wound dressings. The multi-layer wound dressing folded as described above can also be rolled up to form a rolled bandage for use as a non-contact wound dressing. Since the wound dressing needs to be sterilized before use, the non-woven wound dressing 100 of the present invention should be placed in a sealed bag or tray and sterilized by ethylene oxide, steam, gamma radiation or electron beam.

In conclusion, the flexible and thick nonwoven wound dressing 100 of the present invention provides excellent cushioning and other desirable protective properties for various wounds. In addition, the advantages of the non-woven wound dressing 100 of the present invention are highly absorbent, lint-free, soft, smooth, and non-adhering to the wound, ensuring that it has higher efficacy and comfort during use and removal. It should also be noted that the three-dimensional relief non-woven fabric and the advanced non-woven wound dressing 100 of the present invention are both manufactured by non-woven fabric technology, which is more efficient, more automated and more efficient than the manufacturing process of cotton gauze. more sustainable. Unlike "curved gauze" wound dressings, no additional processing steps are required to produce the nonwoven wound dressing 100 of the present invention as compared to conventional conventional nonwoven dressings. Therefore, the cost of the non-woven wound dressing 100 of the present invention will be lower than that of traditional "curved gauze" dressings and ordinary cotton gauze wound dressings, and can be afforded by more countries and hospitals, thereby being widely used.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformations made by the contents of the description and drawings of the present invention, or the direct/indirect application Other related technical fields are included in the scope of patent protection of the present invention.

Claims (13)

1. a non-woven wound dressing, is characterized in that, comprises: A multi-layer viscose-based non-woven fabric, the multi-layer viscose-based non-woven fabric includes at least one interlayer unit, and each of the interlayer units includes two layers of viscose-based non-woven fabric; Wherein, each layer of the viscose-based non-woven fabric has opposite smooth surfaces and rough surfaces, and three-dimensional reliefs are formed on the rough surface; the two layers of viscose-based non-woven fabrics in each sandwich unit , the smooth surface of the upper layer of viscose-based non-woven fabric and the smooth surface of the lower layer of viscose-based non-woven fabric face outward, and the rough surface of the upper layer of viscose-based non-woven fabric and the rough surface of the lower layer of viscose-based non-woven fabric face inward and mutually face each other so that an air interlayer is formed between the upper layer of viscose-based non-woven fabric and the lower layer of viscose-based non-woven fabric. 2 . The non-woven wound dressing according to claim 1 , wherein the smooth surface and the rough surface are formed by spraying a predetermined pressure water jet onto the fiber web and the holding screen curtain below it and reflecting multiple times. 3 . form. 3 . The non-woven wound dressing according to claim 1 , wherein the viscose-based non-woven fabric is made of one or more of viscose fibers, polyester fibers, and bamboo fibers. 4 . 4. The non-woven wound dressing according to claim 1, wherein the weight of the viscose-based non-woven fabric is between 50 g/m2 and 130 g/m2, and the viscose-based nonwoven fabric has a weight between 50 g/m2 and 130 g/m2 The tensile strength of the non-woven fabric in its machine and cross directions is not less than 25 Newtons. 5 . The non-woven wound dressing according to claim 1 , wherein the three-dimensional relief comprises a plurality of protrusions arranged on the rough surface, and the plurality of protrusions are arranged in a pre-designed pattern. 6 . 6 . The non-woven wound dressing according to claim 5 , wherein the protrusion is any one of a hemisphere, a pyramid, a semi-ellipse, a tetrahedron, a cube, a cuboid, and an octahedron. 7 . 7 . The non-woven wound dressing according to claim 5 , wherein the height of each protrusion ranges from 0.05 mm to 1.0 mm. 8 . 8 . The non-woven wound dressing according to claim 1 , wherein the non-woven wound dressing has a width ranging from 2 cm to 100 cm and a length ranging from 2 cm to 600 cm. 9 . 9. The non-woven wound dressing of claim 1, wherein the non-woven wound dressing is folded at least once along itself from a piece of non-woven substrate to form at least two layers of viscose-based non-woven . 10. The non-woven wound dressing according to claim 1, wherein the non-woven wound dressing is formed by laminating and combining multiple sheets of non-woven substrates to form at least two layers of viscose-based non-woven fabrics, Used as a contact wound dressing or a non-contact wound dressing. 11 . The non-woven wound dressing according to claim 1 , wherein the multi-layer viscose-based non-woven fabric is rolled up to make a bandage roll, which is used as a non-contact wound dressing. 12 . 12. A non-woven wound dressing package, characterized in that, comprising: One or more non-woven wound dressings as claimed in any one of claims 1 to 11; A package, wherein the package is a sterilization bag, a blister pack or a sterilization box that is sealed after being packed into the non-woven wound dressing. 13. A non-woven wound dressing as claimed in claims 1 to 11 in use as a contact or non-contact wound dressing, cosmetic or incontinence use cosmetic wipes, wipes, towels, and for neonatal or other patients application on the blanket.

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