Dispersible wet spunlace non-woven fabric with directional fiber arrangement and preparation method thereof

Abstract

The invention discloses a dispersible wet spunlace non-woven fabric with directional fiber arrangement and a preparation method thereof, the nonwoven fabric comprises a first fiber web layer, a second fiber web layer and a third fiber web layer, the first fiber web layer is arranged above the second fiber web layer, the third fiber web layer is arranged below the second fiber web layer, the second fiber web layer is arranged above the third fiber web layer, and the third fiber web layer is arranged below the second fiber web layer. The second fiber web layer comprises degradable long fibers extending in the length direction of the second fiber web layer, and the first fiber web layer and the third fiber web layer are made of degradable short fibers arranged in the random direction and are produced through pulping, wet web forming and spunlace forming. According to the dispersible wet-process spunlace non-woven fabric with directional fiber arrangement and the preparation method thereof, the second fiber web layer is made of degradable long fibers, directional arrangement in the length direction is facilitated, the second fiber web layer is protected through the first fiber web layer and the third fiber web layer, and therefore the wet-process spunlace non-woven fabric with the directional fiber arrangement and the preparation method of the non-woven fabric are improved. The disorder of fiber orientation in the second fiber web layer in the spunlace process is reduced, and the longitudinal tensile strength and the dispersing effect are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of non-woven fabrics, in particular to a flushable wet spunlaced non-woven fabric with directional fiber arrangement and a preparation method thereof. BACKGROUND

[0002] In order to improve the longitudinal tensile strength of the non-woven fabric, it is necessary to improve the degree of orientation of the fibers, such as arranging and extending a larger part of the fibers regularly along the longitudinal direction of the non-woven fabric, improving the degree of orientation, thereby improving the tensile strength of the non-woven fabric in the longitudinal direction, weakening the tensile strength in other directions, and being conducive to achieving flushability.

[0003] There are many production processes for non-woven fabrics, among which spunbond non-woven fabric is conducive to realizing the directional arrangement of fibers, but spunbond non-woven fabric is mainly formed by melt extruding polymers into continuous filaments, and the structure is relatively stable and strong, which is not conducive to realizing flushability under the impact of toilet water flow. In the spunlaced non-woven fabric, the fiber arrangement is usually random, and the spunlacing has a large impact on the fiber arrangement, which is not easy to maintain directional arrangement, and the longitudinal tensile strength is prone to be insufficient, which needs to be improved. SUMMARY

[0004] The purpose of the present application is to provide a flushable wet spunlaced non-woven fabric with directional fiber arrangement and a preparation method thereof, to realize the directional arrangement of part of the fibers and ensure the flushability effect and the longitudinal tensile strength.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] A flushable wet spunlaced non-woven fabric with directional fiber arrangement, comprising: a first fiber web layer, a second fiber web layer and a third fiber web layer, the first fiber web layer is arranged above the second fiber web layer, the third fiber web layer is arranged below the second fiber web layer, the second fiber web layer comprises degradable long fibers extending along the length direction of the second fiber web layer, and the first fiber web layer and the third fiber web layer adopt randomly arranged degradable short fibers.

[0007] Among them, the degradable long fibers adopt long floss cotton fibers.

[0008] Among them, the length of the degradable long fibers is greater than 40mm.

[0009] Among them, the length of the degradable short fibers is less than 20mm.

[0010] Among them, the degradable short fibers adopt one or both of viscose short fibers and bamboo fibers.

[0011] To achieve this purpose, the present application adopts the following another technical solution:

[0012] A preparation method of a non-woven fabric, comprising the following steps:

[0013] S1, pulping:

[0014] The degradable short fibers are mixed with water and stirred uniformly to prepare a first fiber slurry;

[0015] The degradable long fibers are mixed with water and stirred uniformly to prepare a second fiber slurry;

[0016] S2, wet laying:

[0017] The first fiber slurry is sprayed through a first forming head onto a moving forming wire curtain by a first pulp distributor to form a third fiber web layer;

[0018] The second fiber slurry is sprayed through a second forming head onto the moving third fiber web layer by a second pulp distributor to form a second fiber web layer;

[0019] The first fiber slurry is sprayed through a third forming head onto the moving second fiber web layer by a third pulp distributor to form a first fiber web layer, which is dehydrated by a dehydration tank to obtain a composite fiber web with a three-layer structure;

[0020] S3, hydroentanglement:

[0021] The composite fiber web is sent into a hydroentanglement machine for hydroentanglement to form a non-woven fabric, and the conveying speed of the composite fiber web in the hydroentanglement machine is 20 m / min, and the hydroentanglement pressure is controlled at 30-100 bar;

[0022] S4, drying:

[0023] The non-woven fabric is first sent under a wind knife to remove water by wind cutting, and then is sent through an oven for drying treatment.

[0024] In the first fiber slurry, the weight percentage of the degradable short fibers is 0.03-0.1%.

[0025] In the second fiber slurry, the weight percentage of the degradable long fibers is 0.04-0.08%.

[0026] The present application has the following advantages: a dispersible wet hydroentanglement non-woven fabric with directional fiber arrangement and a preparation method thereof, which adopts a three-layer composite structure, the second fiber web layer adopts degradable long fibers, which is beneficial to directional arrangement along the length direction, and the second fiber web layer is protected by the first fiber web layer and the third fiber web layer, reducing the confusion of fiber arrangement in the second fiber web layer during hydroentanglement, ensuring the longitudinal tensile strength, and having good dispersibility. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the present application. DETAILED DESCRIPTION

[0028] The following will be described in combination withFigure 1 The technical solutions of the present application are further illustrated by specific embodiments.

[0029] As Figure 1 shown, the dispersible wet spunlaced non-woven fabric with directional fiber arrangement includes: a first fiber web layer 1, a second fiber web layer 2 and a third fiber web layer 3, the first fiber web layer 1 is arranged above the second fiber web layer 2, and the third fiber web layer 3 is arranged below the second fiber web layer, and the stability of the three-layer composite structure is ensured by the spunlace process.

[0030] The second fiber web layer 2 includes degradable long fibers extending along the length direction of the second fiber web layer 2, and in the embodiment, the degradable long fibers adopt long-fuzz cotton fibers, which are soft in texture, good in moisture absorption effect, and can be degraded to reduce environmental pollution.

[0031] In the embodiment, the length of the degradable long fibers is greater than 40 mm, and the long-fuzz cotton fibers with large length are more likely to form directional arrangement, thereby improving the tensile strength in the corresponding direction.

[0032] As Figure 1 shown, the first fiber web layer 1 and the third fiber web layer 3 adopt degradable short fibers arranged randomly, and the length of the degradable short fibers is less than 20 mm, so that the degradable short fibers can be randomly distributed without directional arrangement.

[0033] In the embodiment, the degradable short fibers adopt one or both of viscose short fibers and bamboo fibers, and both the viscose short fibers and the bamboo fibers can be degraded and are environmentally friendly. In addition, the degradable short fibers are short, which is conducive to dispersibility in the water flow of the toilet.

[0034] A preparation method of a non-woven fabric includes the following steps:

[0035] S1, pulp preparation:

[0036] The degradable short fibers are mixed with water and stirred uniformly to prepare a first fiber slurry, and the weight percentage of the degradable short fibers in the first fiber slurry is 0.03-0.1%, and in the embodiment, the weight percentage of the degradable short fibers is 0.03%, which is conducive to controlling the thickness of the first fiber web layer 1 and the third fiber web layer 3 and avoiding the problem of excessive thickness.

[0037] The degradable long fibers are mixed with water and stirred uniformly to prepare a second fiber slurry, and the weight percentage of the degradable long fibers in the second fiber slurry is 0.04-0.08%, and in the embodiment, the weight percentage of the degradable long fibers is 0.08%, which is conducive to increasing the thickness of the second fiber web layer 2 and maintaining directional arrangement of a large number of degradable long fibers to improve the degree of directionality.

[0038] S2, wet laying:

[0039] The first fiber slurry is sprayed by the first pulp distributor through the first forming head onto the moving forming screen curtain to form the third fiber web layer 3. A suction device can be installed below the first forming head to perform suction on the bottom of the forming screen curtain to reduce the moisture of the third fiber web layer 3.

[0040] The second fiber slurry is sprayed by the second pulp distributor through the second forming head onto the moving third fiber web layer 3 to form the second fiber web layer 2. The conveying speed of the forming screen curtain is 20 m / min, which is fast and is conducive to improving the directional arrangement of the degradable long fibers in the second fiber web layer 2 along the length direction of the forming screen curtain and reducing the randomly scattered degradable long fibers in the second fiber web layer 2.

[0041] The first fiber slurry is sprayed by the third pulp distributor through the third forming head onto the moving second fiber web layer 2 to form the first fiber web layer 1. The dehydrating box is used for dehydration to obtain a composite fiber web with a three-layer structure.

[0042] At this time, the first fiber web layer 1 and the third fiber web layer 3 are compounded on the upper and lower sides of the second fiber web layer 2 to protect the second fiber web layer 2 and reduce the influence of water flow impact on the directional arrangement of the degradable long fibers in the subsequent hydroentanglement process.

[0043] S3, hydroentanglement forming:

[0044] The composite fiber web is sent into the hydroentanglement machine to perform hydroentanglement processing to obtain a non-woven fabric. In this embodiment, the conveying speed of the composite fiber web in the hydroentanglement machine is 20 m / min, the conveying speed is fast, the hydroentanglement pressure is controlled at 60 bar, the water flow impact force is small, the directional degree of the degradable long fibers in the second fiber web layer 2 is ensured, the directional arrangement of the degradable long fibers along the length direction of the non-woven fabric is maintained at 30-40%, and the tensile strength is improved.

[0045] S4, drying:

[0046] The non-woven fabric is first sent below the air knife to perform air cutting to remove water, and then is sent through the oven for drying treatment. The air cutting to remove water can remove most of the moisture, which is conducive to reducing the energy consumption of the oven.

[0047] The above is only a preferred embodiment of the present application. Those skilled in the art can make changes in specific implementation manners and application ranges according to the idea of the present application. The content of the specification should not be understood as a limitation of the present application.

Claims

1. A disintegratable wet-laid spunlace nonwoven fabric with oriented fiber arrangement, characterized in that: include: A first fiber web layer, a second fiber web layer and a third fiber web layer, wherein the first fiber web layer is arranged above the second fiber web layer, and the third fiber web layer is arranged below the second fiber web layer, the second fiber web layer includes degradable long fibers extending along the length direction of the second fiber web layer, and the first fiber web layer and the third fiber web layer use randomly arranged degradable short fibers.

2. The flushable wet-laid spunlace nonwoven fabric with oriented fiber arrangement according to claim 1, characterized in that: The degradable long fibers are long-staple cotton fibers.

3. The flushable wet-laid spunlace nonwoven fabric with oriented fiber arrangement according to claim 1, characterized in that: The length of the degradable long fiber is greater than 40 mm.

4. The flushable wet-laid spunlace nonwoven fabric with oriented fiber arrangement according to claim 1, characterized in that: The length of the degradable short fibers is less than 20 mm.

5. The flushable wet-laid spunlace nonwoven fabric with oriented fiber arrangement according to claim 1, characterized in that: The degradable short fibers are one or both of viscose short fibers and bamboo fibers.

6. A method for preparing a nonwoven fabric, for preparing the disintegrable wet-laid spunlace nonwoven fabric with oriented fiber arrangement according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Pulping: Mixing the degradable short fibers with water and stirring evenly to prepare a first fiber slurry; Mixing the degradable long fibers with water and stirring evenly to prepare a second fiber slurry; S2, wet-laid web forming: Using a first pulp distributor, the first fiber slurry is sprayed onto the moving forming mesh curtain through a first forming head to form a third fiber web layer; using a second slurry distributor to spray a second fiber slurry onto the moving third fiber web layer through a second forming head to form a second fiber web layer; The first fiber slurry is sprayed onto the moving second fiber web layer through the third forming head by the third slurry distributor to form the first fiber web layer, which is then dehydrated in the dehydration box to obtain a three-layer composite fiber web. S3, hydroentanglement: The composite fiber web is fed into a spunlace machine for spunlace processing to obtain a non-woven fabric. The conveying speed of the composite fiber web in the spunlace machine is 20 m / min, and the spunlace pressure is controlled at 30 to 100 bar.

7. The method for preparing a nonwoven fabric according to claim 6, wherein: In the first fiber slurry, the weight proportion of the degradable short fibers is 0.03-0.1%.

8. The method for preparing a nonwoven fabric according to claim 6, wherein: In the second fiber slurry, the weight proportion of the degradable long fibers is 0.04-0.08%.

9. The method for preparing a nonwoven fabric according to claim 6, wherein: It also includes a drying step, first sending the non-woven fabric under the air knife to remove water by air cutting, and then passing through the oven for drying.

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