Medical multilayer hydrophilic non-woven fabric

Abstract

The utility model discloses a medical multilayer hydrophilic non-woven fabric, which sequentially comprises a hydrophilic non-woven fabric wear-resistant layer, a hydrophilic non-woven fabric high-absorption layer and a hydrophilic non-woven fabric bonding layer along the thickness direction, a multilayer combination mode is adopted to realize high absorption, low overflow and good wear resistance, each layer is a hydrophilic layer, the hydrophilic non-woven fabric bonding layer is a hydrophilic non-woven fabric bonding layer, the hydrophilic non-woven fabric bonding layer is a hydrophilic non-woven fabric bonding layer, and the hydrophilic non-woven fabric bonding layer is a hydrophilic non-woven fabric bonding layer. The surface layer is the wear-resistant layer and can prevent the problems of fuzzing and flocculus falling clinically, the high-absorption layer is a high-fluffy layer and has excellent liquid absorption capacity and low overflow capacity, and the bonding layer is convenient for subsequent compounding with other films or other non-woven fabrics and provides corresponding peeling strength; the multi-layer composition is compounded in an ultrasonic mode, the traditional hot melt adhesive compounding mode is reduced, the composition is more efficient and convenient, the production efficiency is greatly improved, and the composition can be widely applied to medical surgical drapes.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument field especially relates to a medical multilayer hydrophilic non -woven fabric. BACKGROUND

[0002] The hydrophilic composition of prior art mainly adopts the combination of water absorption paper and spun -bond non -woven fabric, or the combination of hydrophilic melt -blown / spun -bond non -woven fabric, and the material density of hydrophilic absorption layer is large, and the absorption amount is limited, and at the same time, the risk of blood overflow from the protection area is caused by the high overflow amount, and in addition, the melt -blown or water absorption paper has the problem of falling flocculation, and causes the spread of infection source.

[0003] Therefore, for the demand of high water absorption performance, the control of liquid overflow and the detail processing (such as reducing the falling flocculation and controlling the infection risk) of medical products, a new structure composition is urgently needed to provide to improve its performance and ensure better liquid management and protection effect. UTILITY MODEL CONTENT

[0004] The utility model discloses a medical multilayer hydrophilic non -woven fabric, and different functional hydrophilic non -woven fabric layers are combined to solve the technical problems of poor surface wear resistance, falling flocculation risk, low absorption amount and high overflow amount.

[0005] TECHNICAL SCHEME

[0006] A medical multilayer hydrophilic non -woven fabric includes a hydrophilic non -woven fabric wear -resistant layer, a hydrophilic non -woven fabric high -absorption layer and a hydrophilic non -woven fabric adhesive layer in turn along the thickness direction and is consolidated by the ultrasonic wave.

[0007] The surface layer is the wear -resistant layer mainly to prevent the problem of fluffing and falling flocculation in clinic, the high -absorption layer is the high -loft layer, has excellent liquid absorption capacity and low overflow performance, and the adhesive layer is mainly to be compounded with other films or other non -woven fabrics subsequently, and corresponding peel strength is provided.

[0008] Further, the hydrophilic non -woven fabric wear -resistant layer is composed of hydrophilic polypropylene spun -bond non -woven fabric.

[0009] Further, the Martin Dale wear resistance grade of the hydrophilic polypropylene spun -bond non -woven fabric is greater than or equal to 3 levels.

[0010] Further, the hydrophilic non -woven fabric high -absorption layer is composed of hydrophilic bicomponent hot air non -woven fabric.

[0011] Further, the hydrophilic non -woven fabric high -absorption layer is composed of parallel bicomponent spun -bond non -woven fabric.

[0012] Further, the hydrophilic non -woven fabric adhesive layer is composed of hydrophilic polypropylene spun -bond non -woven fabric.

[0013] Further, the mass ratio of the hydrophilic nonwoven wear-resistant layer, the hydrophilic nonwoven high-absorption layer and the hydrophilic nonwoven adhesive layer is 1-5:2-10:1-5.

[0014] Further, the unit area mass of the hydrophilic nonwoven wear-resistant layer is 7 g / m 2 -35 g / m 2 , the unit area mass of the hydrophilic nonwoven high-absorption layer is 15 g / m 2 -60 g / m 2 , and the unit area mass of the hydrophilic nonwoven adhesive layer is 7 g / m 2 -35 g / m 2 .

[0015] Further, the bulk density of the hydrophilic nonwoven wear-resistant layer is 0.1 g / cm³-0.2 g / cm³, the bulk density of the hydrophilic nonwoven high-absorption layer is 0.025 g / cm³-0.1 g / cm³, and the bulk density of the hydrophilic nonwoven adhesive layer is 0.08 g / cm³-0.2 g / cm³.

[0016] Beneficial effects:

[0017] 1. A multi-layer combination is adopted to realize high absorption, low overflow and good wear resistance, wherein each layer is a hydrophilic layer and has excellent liquid absorption rate.

[0018] 2. The surface layer is a wear-resistant layer, which can prevent the problems of fluffing and shedding in clinical use, the high-absorption layer is a high-porosity layer, which has excellent liquid absorption capacity and low overflow performance, and the adhesive layer is convenient for subsequent compounding with other films or other nonwoven fabrics to provide corresponding peel strength.

[0019] 3. The multi-layer composition is compounded by ultrasonic waves, which reduces the traditional hot melt adhesive compounding method, is more efficient and convenient, and greatly improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of the utility model. DETAILED DESCRIPTION

[0021] In order to make the technical scheme of the present application clearer, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0022] As Figure 1 shown, a medical multi-layer hydrophilic nonwoven fabric sequentially includes a hydrophilic nonwoven wear-resistant layer 1, a hydrophilic nonwoven high-absorption layer 2 and a hydrophilic nonwoven adhesive layer 3 which are fixed by ultrasonic compounding.

[0023] Further, the hydrophilic nonwoven fabric wear-resistant layer 1 is composed of a hydrophilic polypropylene spunbond nonwoven fabric, which is a material known in the prior art. Spunbond nonwoven fabrics made of polypropylene are widely used in the fields of medical care, hygiene, filtration, moisture absorption, etc. By modifying or adding hydrophilic components to improve their water absorption performance has become a common technical means.

[0024] Further, the hydrophilic polypropylene spunbond nonwoven fabric has a Martindale wear resistance grade of 3 or above. The Martindale wear resistance test is a standard commonly used to test the wear resistance of textiles. In general, polypropylene spunbond nonwoven fabrics have strong wear resistance, especially after optimization of the hot calender process, such as increasing the calender hot melt ratio, calender temperature and pressure, etc., the wear resistance can be further improved to reach a wear resistance grade of 3 or above. Such wear resistance modification technology has been widely used in the field of textiles.

[0025] Further, the hydrophilic nonwoven fabric high absorption layer 2 is composed of a hydrophilic bicomponent air-through nonwoven fabric. Bicomponent nonwoven fabric is a common type of nonwoven fabric, which is made by combining two different fiber materials, one of which is usually hydrophilic fiber; the other is a bicomponent fiber with a skin-core structure. Through air-through technology, it is processed into a nonwoven fabric, and the product has high loft, which can improve its water absorption and moisture absorption performance. Bicomponent air-through nonwoven fabric has been widely used as a water absorption layer material in sanitary napkins, adult paper diapers and other moisture absorption products.

[0026] Further, the hydrophilic nonwoven fabric high absorption layer 2 is composed of a parallel bicomponent spunbond nonwoven fabric. Parallel bicomponent spunbond nonwoven fabric is a new type of nonwoven fabric form, which adopts a parallel structure of fiber layout, and the fiber has a spiral structure, making the product have high loft and high absorption. This type of material also has many applications in the prior art, especially in hygiene products and moisture absorption materials.

[0027] Further, the hydrophilic nonwoven fabric adhesive layer 3 is composed of hydrophilic polypropylene spun-bonded nonwoven fabric. The hydrophilic polypropylene spun-bonded nonwoven fabric can not only be used as a wear-resistant layer or a water-absorbing layer, but also be used as an adhesive layer. The adhesive layer is generally used to provide adhesion between layers or to enhance the stability of the material structure. Polypropylene spun-bonded nonwoven fabric is often used as an adhesive layer.

[0028] Further, the mass ratio of the hydrophilic nonwoven fabric wear-resistant layer 1, the hydrophilic nonwoven fabric high-absorption layer 2 and the hydrophilic nonwoven fabric adhesive layer 3 is 1-5:2-10:1-5.

[0029] Further, the unit area mass of the hydrophilic nonwoven fabric wear-resistant layer is 7 g / m 2 -35 g / m 2 , the unit area mass of the hydrophilic nonwoven fabric high-absorption layer is 15 g / m 2 -60 g / m 2 , and the unit area mass of the hydrophilic nonwoven fabric adhesive layer is 7 g / m 2 -35 g / m 2 .

[0030] Further, the bulk density of the hydrophilic nonwoven fabric wear-resistant layer is 0.1 g / cm³-0.2 g / cm³, the bulk density of the hydrophilic nonwoven fabric high-absorption layer is 0.025 g / cm³-0.1 g / cm³, and the bulk density of the hydrophilic nonwoven fabric adhesive layer is 0.08 g / cm³-0.2 g / cm³.

[0031] The application will be further described in detail below in conjunction with specific examples and comparative examples: Examples

[0032] The wear-resistant layer is a hydrophilic polypropylene spun-bonded nonwoven fabric prepared by an in-line oiling process, with a unit area mass of 18 g / m 2 , a bulk density of 0.15 g / cm³, a liquid absorption time of 2.3 s, a liquid absorption amount of 865%, an overflow amount of 81%, and a wear-resistant grade of 4; the high-absorption layer is a hydrophilic bicomponent PE / PP through-air nonwoven fabric, with a unit area mass of 22 g / m 2 , a bulk density of 0.05 g / cm³, a liquid absorption time of 2.1 s, a liquid absorption amount of 1060%, an overflow amount of 53%; the adhesive layer is a hydrophilic polypropylene spun-bonded nonwoven fabric prepared by an in-line oiling process, with a unit area mass of 18 g / m 2 , a bulk density of 0.12 g / cm³, a liquid absorption time of 2.1 s, a liquid absorption amount of 910%, an overflow amount of 78%; the three-layer nonwoven fabric is consolidated into a composition by ultrasonic compounding, with a unit area mass of 58 g / m 2, the liquid absorption time is 2.1s, the liquid absorption amount is 870%, and the overflow amount is 27.8%. Example 1

[0033] The wear-resistant layer is a hydrophilic polypropylene spun-bonded nonwoven fabric prepared by an in-line oiling process, with a unit area mass of 18 g / m 2 , a bulk density of 0.15 g / cm³, a liquid absorption time of 2.3s, a liquid absorption amount of 865%, an overflow amount of 81%, and a wear-resistant grade of 4; the high-absorption layer is a hydrophilic bicomponent PE / PP through-air nonwoven fabric, with a unit area mass of 25 g / m 2 , a bulk density of 0.035 g / cm³, a liquid absorption time of 2.2s, a liquid absorption amount of 1250%, and an overflow amount of 40%; the adhesive layer is a hydrophilic polypropylene spun-bonded nonwoven fabric prepared by an in-line oiling process, with a unit area mass of 18 g / m 2 , a bulk density of 0.12 g / cm³, a liquid absorption time of 2.1s, a liquid absorption amount of 910%, and an overflow amount of 78%; the three-layer nonwoven fabric is consolidated into the composition by an ultrasonic compounding method, with a unit area mass of 61 g / m 2 , a liquid absorption time of 2.1s, a liquid absorption amount of 930%, and an overflow amount of 24.5%. Example 2

[0034] The wear-resistant layer is a hydrophilic polypropylene spun-bonded nonwoven fabric prepared by an in-line oiling process, with a unit area mass of 20 g / m 2 , a bulk density of 0.16 g / cm³, a liquid absorption time of 2.3s, a liquid absorption amount of 926%, an overflow amount of 78%, and a wear-resistant grade of 4; the high-absorption layer is a hydrophilic parallel bicomponent PP1 / PP2 spun-bonded nonwoven fabric, with a unit area mass of 22 g / m 2 , a bulk density of 0.06 g / cm³, a liquid absorption time of 2.6s, a liquid absorption amount of 802%, and an overflow amount of 66%; the adhesive layer is a hydrophilic polypropylene spun-bonded nonwoven fabric prepared by an in-line oiling process, with a unit area mass of 18 g / m 2 , a bulk density of 0.12 g / cm³, a liquid absorption time of 2.1s, a liquid absorption amount of 910%, and an overflow amount of 78%; the three-layer nonwoven fabric is consolidated into the composition by an ultrasonic compounding method, with a unit area mass of 60 g / m 2 , a liquid absorption time of 2.6s, a liquid absorption amount of 800%, and an overflow amount of 37.3%.

[0035] Comparative Example 1

[0036] The wear-resistant layer is a hydrophilic polypropylene spun-bonded nonwoven fabric prepared by an in-line oiling process, with a unit area mass of 22 g / m2 , the bulk density is 0.15 g / cm3, the liquid absorption time is 2.5 s, the liquid absorption amount is 815%, the overflow amount is 76%, and the wear resistance is grade 3; the high absorption layer is a hydrophilic melt-blown layer, and the mass per unit area is 40 g / m 2 , the bulk density is 0.1 g / cm3, the liquid absorption time is 2.6 s, the liquid absorption amount is 950%, and the overflow amount is 47%; the two layers of non-woven fabrics are consolidated into a composition by ultrasonic compounding, and the mass per unit area is 62 g / m 2 , the liquid absorption time is 2.6 s, the liquid absorption amount is 695%, and the overflow amount is 69%.

[0037] Example 2 shows the best absorption performance and stability, and is suitable for medical non-woven fabrics with high water absorption, while Example 3 is more excellent in durability and cost, and compared with Comparative Example 1, the examples are far superior to the comparative example.

[0038] The above-described examples only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A medical multilayer hydrophilic nonwoven fabric, characterized in that, Along the thickness direction, it includes a hydrophilic nonwoven abrasion-resistant layer (1), a hydrophilic nonwoven high-absorption layer (2), and a hydrophilic nonwoven adhesive layer (3), which are bonded together by ultrasonic bonding.

2. The medical multilayer hydrophilic nonwoven fabric according to claim 1, characterized in that, The hydrophilic nonwoven abrasion-resistant layer (1) is composed of hydrophilic polypropylene spunbond nonwoven fabric.

3. The medical multilayer hydrophilic nonwoven fabric according to claim 2, characterized in that, The hydrophilic polypropylene spunbond nonwoven fabric has a Martindale abrasion resistance rating of 3 or higher.

4. The medical multilayer hydrophilic nonwoven fabric according to claim 1, characterized in that, The hydrophilic nonwoven high-absorption layer (2) is composed of a hydrophilic bicomponent hot air nonwoven fabric.

5. A medical multilayer hydrophilic nonwoven fabric according to claim 1, characterized in that, The hydrophilic nonwoven high-absorption layer (2) is composed of parallel bicomponent spunbond nonwoven fabrics.

6. A medical multilayer hydrophilic nonwoven fabric according to claim 1, characterized in that, The hydrophilic nonwoven adhesive layer (3) is composed of hydrophilic polypropylene spunbond nonwoven fabric.

7. A medical multilayer hydrophilic nonwoven fabric according to claim 1, characterized in that, The mass ratio of the hydrophilic nonwoven abrasion-resistant layer (1), the hydrophilic nonwoven high-absorption layer (2), and the hydrophilic nonwoven adhesive layer (3) is 1-5:2-10:1-5.

8. A medical multilayer hydrophilic nonwoven fabric according to claim 7, characterized in that, The unit area mass of the hydrophilic nonwoven abrasion layer (1) is 7 g / m². 2 -35g / m 2 The unit area mass of the hydrophilic nonwoven high-absorption layer (2) is 15 g / m². 2 -60 g / m 2 The unit area mass of the hydrophilic nonwoven adhesive layer (3) is 7 g / m². 2 -35 g / m 2 .

9. A medical multilayer hydrophilic nonwoven fabric according to claim 1, characterized in that, The bulk density of the hydrophilic nonwoven abrasion-resistant layer (1) is 0.1 g / cm³-0.2 g / cm³, the bulk density of the hydrophilic nonwoven high-absorption layer (2) is 0.025 g / cm³-0.1 g / cm³, and the bulk density of the hydrophilic nonwoven adhesive layer (3) is 0.08 g / cm³-0.2 g / cm³.

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