Low-fuzzing twin-spun non-woven material and preparation method thereof

Abstract

The invention discloses a low-fuzzing twin-spun non-woven material and a preparation method thereof.The low-fuzzing twin-spun non-woven material comprises an airflow fiber web layer, a first melt-blown fiber web layer, a second melt-blown fiber web layer, a first composite fiber web layer and a second composite fiber web layer, the first composite fiber web layer is arranged above the airflow fiber web layer, and the second composite fiber web layer is arranged above the airflow fiber web layer; the first melt-blown fiber mesh layer is arranged above the first composite fiber mesh layer, the second composite fiber mesh layer is arranged below the airflow fiber mesh layer, and the second melt-blown fiber mesh layer is arranged below the second composite fiber mesh layer; the first composite fiber net layer and the second composite fiber net layer are of a melt-blown fiber and wood pulp fiber mixed net forming structure, the airflow fiber net layer is of a wood pulp fiber airflow net forming structure, and the moisture absorption effect is improved through the two faces of the first composite fiber net layer and the two faces of the second composite fiber net layer. And the light and thin first melt-blown fiber mesh layer and the second melt-blown fiber mesh layer are added, so that friction fuzzing is not easy to occur.

Description

Technical Field

[0001] This invention relates to the field of twin-spun nonwoven materials, and in particular to a low-pile twin-spun nonwoven material and its preparation method. Background Technology

[0002] Twin-spun nonwovens are nonwoven materials produced by a dry process, combining ultra-fine, long meltblown fibers (only 1-5 μm in diameter) generated through meltblowing with wood pulp fibers and other functional fibers. Twin-spun nonwovens contain both continuous ultra-fine meltblown fibers and discontinuous virgin wood pulp fibers. Furthermore, depending on the application requirements, other functional fibers, superabsorbent polymers (SAP / SAF), and other auxiliary materials can be added in specific proportions to enhance their performance and diversify the product range.

[0003] To improve surface moisture absorption, a structure of meltblown fiber and wood pulp fiber can be used on the surface of twin-spun nonwoven materials, which increases the content of wood pulp fiber. However, this results in a rougher surface, which is prone to fuzzing under friction during use, affecting the user experience and requiring improvement. Summary of the Invention

[0004] The main technical problem solved by this invention is to provide a low-pilling twin-spun nonwoven material and its preparation method, which improves the moisture absorption effect and reduces surface pilling.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a low-pile twin-spun nonwoven material, comprising: an air-flow fiber web layer, a first meltblown fiber web layer, a second meltblown fiber web layer, a first composite fiber web layer, and a second composite fiber web layer, wherein the first composite fiber web layer is disposed above the air-flow fiber web layer, the first meltblown fiber web layer is disposed above the first composite fiber web layer, the second composite fiber web layer is disposed below the air-flow fiber web layer, and the second meltblown fiber web layer is disposed below the second composite fiber web layer, wherein the first composite fiber web layer and the second composite fiber web layer adopt a web structure formed by mixing meltblown fibers and wood pulp fibers, and the air-flow fiber web layer adopts a wood pulp fiber air-flow web structure.

[0006] In a preferred embodiment of the present invention, the first meltblown fiber web layer and the second meltblown fiber web layer adopt a meltblown fiber web structure.

[0007] In a preferred embodiment of the present invention, the meltblown fiber is one or more of PP fiber, PLA fiber or PHA fiber.

[0008] In a preferred embodiment of the present invention, the meltblown fiber is a mixture of polypropylene and hydrophilic masterbatch meltblown fiber.

[0009] In a preferred embodiment of the present invention, the meltblown fiber comprises 50-70 parts by weight of polypropylene and 1-3 parts by weight of hydrophilic masterbatch.

[0010] In a preferred embodiment of the present invention, the thickness of the first meltblown fiber web layer is less than the thickness of the first composite fiber web layer, and the thickness of the second meltblown fiber web layer is less than the thickness of the second composite fiber web layer.

[0011] In a preferred embodiment of the present invention, the ratio of wood pulp fiber to meltblown fiber in the first composite fiber web layer and the second composite fiber web layer is 1:1.5~2.

[0012] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is: to provide a method for preparing a low-pile twin-spun nonwoven material, comprising the following steps: S1. Forming of the second meltblown fiber mesh layer: The meltblown fiber raw material is fed into the first screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the first spinneret. Under the stretching action of the high temperature and high speed airflow, the first meltblown fiber stream is formed and deposited on the condensing screen of the web forming machine to form the second meltblown fiber web layer. S2. Forming of the second composite fiber web layer: The raw material for meltblown fiber is fed into the second screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the second spinneret and formed into a second meltblown fiber stream under the stretching action of high temperature and high speed airflow. Simultaneously, wood pulp fibers are blown into the second meltblown fiber stream through an air conveying device for mixing and synchronous deposition on the second meltblown fiber web to form a second composite fiber web. S3. Forming of the airflow fiber web layer: After the wood pulp fibers are combed into single fibers, compressed air is used to send the wood pulp fibers to the airflow forming nozzle to form an airflow fiber web layer above the second composite fiber web layer. S4. Forming of the first composite fiber web layer: The raw material for meltblown fiber is fed into the third screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the third spinneret and formed into a third meltblown fiber stream under the stretching action of high temperature and high speed airflow. Wood pulp fibers are blown into the third meltblown fiber stream through an airflow conveying device, mixed, and simultaneously deposited on the airflow fiber web to form the first composite fiber web. S5. Forming of the first meltblown fiber mesh layer: The meltblown fiber raw material is fed into the fourth screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the fourth spinneret. Under the stretching action of the high temperature and high speed airflow, the fourth meltblown fiber flow is formed and deposited on the first composite fiber web layer to form the first meltblown fiber web layer. S6. Hot rolling treatment: Embossing is performed using hot-rolled embossing rollers to obtain low-pile twin-spun nonwoven materials.

[0013] The beneficial effects of the present invention are as follows: The present invention discloses a low-pilling twin-spun nonwoven material and its preparation method, which specially designs a first composite fiber web layer and a second composite fiber web layer to improve the moisture absorption effect on both sides, and adds a thin first meltblown fiber web layer and a second meltblown fiber web layer to improve the surface smoothness, strengthen the protection of the first composite fiber web layer and the second composite fiber web layer, and reduce the problem of surface pilling due to friction. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of a preferred embodiment of a low-pile twin-spun nonwoven material and its preparation method according to the present invention. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1 The embodiments of the present invention include: like Figure 1 The low-pile twin-spun nonwoven material shown includes: air-flow fiber web layer 1, first meltblown fiber web layer 3, second meltblown fiber web layer 5, first composite fiber web layer 2 and second composite fiber web layer 4. The air-flow fiber web layer 1 adopts a wood pulp fiber air-flow web structure, which increases the internal rapid water absorption and water retention capacity through wood pulp fibers, can quickly absorb liquid and keep moisture from leaking out.

[0017] The first composite fiber web layer 2 is disposed above the airflow fiber web layer 1, the first meltblown fiber web layer 3 is disposed above the first composite fiber web layer 2, and the second composite fiber web layer 4 is disposed below the airflow fiber web layer 1. In this embodiment, the first composite fiber web layer 2 and the second composite fiber web layer 4 adopt a web structure formed by mixing meltblown fiber and wood pulp fiber. Specifically, in the first composite fiber web layer 2 and the second composite fiber web layer 4, the specific gravity of wood pulp fiber to meltblown fiber is 1:1.5~2. The first composite fiber web layer 2 and the second composite fiber web layer 4 use wood pulp fiber with a small specific gravity for transition, improve surface moisture absorption, and control the problem of fuzzing.

[0018] like Figure 1 As shown, the second meltblown fiber web layer 5 is disposed below the second composite fiber web layer 4. The first meltblown fiber web layer 3 and the second meltblown fiber web layer 5 adopt a meltblown fiber web structure, using only meltblown fibers to ensure surface smoothness, reduce friction and fuzzing, and minimize surface fuzzing problems. In this embodiment, the thickness of the first meltblown fiber web layer 3 is less than the thickness of the first composite fiber web layer 2, and the thickness of the second meltblown fiber web layer 5 is less than the thickness of the second composite fiber web layer 4. The thin and light design of the first meltblown fiber web layer 3 and the second meltblown fiber web layer 5 provides good water permeability without affecting the moisture absorption of the first composite fiber web layer 2 and the second composite fiber web layer 4.

[0019] The meltblown fiber is one or more of PP fiber, PLA fiber or PHA fiber. In this embodiment, the meltblown fiber is a mixture of polypropylene and hydrophilic masterbatch. Specifically, the meltblown fiber contains 50 to 70 parts by weight of polypropylene and 1 to 3 parts by weight of hydrophilic masterbatch. The hydrophilic masterbatch can give the nonwoven fabric high-efficiency hydrophilicity and smoothness, and the surface is not easy to fuzz and the fibers are not easy to peel off.

[0020] A method for preparing a low-pile twin-spun nonwoven material includes the following steps: S1. Forming of the second meltblown fiber mesh layer: The meltblown fiber raw material is fed into the first screw extruder, heated and melted to about 200°C to form a melt, which is then extruded through the first spinneret. Under the stretching action of the high temperature and high speed airflow, the first meltblown fiber flow is formed and deposited on the condensing screen of the web forming machine to form the second meltblown fiber web layer 5. S2. Forming of the second composite fiber web layer: The raw material for meltblown fiber is fed into the second screw extruder, heated and melted to about 200°C to form a melt, which is then extruded through the second spinneret and formed into a second meltblown fiber stream under the stretching action of high temperature and high speed airflow. Simultaneously, wood pulp fibers are blown into the second meltblown fiber stream through an airflow conveying device for mixing and synchronous deposition on the second meltblown fiber web layer 5 to form the second composite fiber web layer 4, which has a stable structure. S3. Forming of the airflow fiber web layer: After the wood pulp fibers are combed into single fibers, compressed air is used to send the wood pulp fibers to the airflow forming nozzle, forming the airflow fiber web layer 1 above the second composite fiber web layer 4, as shown. Figure 1 As shown, the airflow fiber mesh layer 1 has a large thickness, resulting in good water absorption and water retention effects; S4. Forming of the first composite fiber web layer: The raw material for meltblown fiber is fed into the third screw extruder, heated and melted to about 200°C to form a melt, which is then extruded through the third spinneret and formed into a third meltblown fiber stream under the stretching action of high temperature and high speed airflow. Wood pulp fibers are blown into the third meltblown fiber stream through an airflow conveying device, mixed, and simultaneously deposited on the airflow fiber web layer 1 to form the first composite fiber web layer 2, thereby improving the surface water absorption effect. S5. Forming of the first meltblown fiber mesh layer: The meltblown fiber raw material is fed into the fourth screw extruder, heated and melted to about 200°C to form a melt, which is then extruded through the fourth spinneret. Under the stretching action of the high temperature and high speed airflow, it forms the fourth meltblown fiber stream and is deposited on the first composite fiber web layer 2 to form the first meltblown fiber web layer 3, which provides protection for the first composite fiber web layer 2. S6. Hot rolling treatment: Embossing is performed using hot-rolled embossing rollers to obtain low-pile twin-spun nonwoven materials, ensuring structural stability and allowing for winding and cutting.

[0021] In summary, the low-pilling twin-spun nonwoven material and its preparation method disclosed in this invention improve the overall moisture absorption effect, have good wear resistance, reduce the problem of surface pilling, and have a wide range of applications.

[0022] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A low-pile twin-spun nonwoven material, characterized in that, include: The system comprises an airflow fiber web layer, a first meltblown fiber web layer, a second meltblown fiber web layer, a first composite fiber web layer, and a second composite fiber web layer. The first composite fiber web layer is disposed above the airflow fiber web layer, the first meltblown fiber web layer is disposed above the first composite fiber web layer, the second composite fiber web layer is disposed below the airflow fiber web layer, and the second meltblown fiber web layer is disposed below the second composite fiber web layer. The first and second composite fiber web layers are constructed using a web structure that combines meltblown fiber and wood pulp fiber, while the airflow fiber web layer is constructed using an airflow fiber web structure.

2. The low-pile twin-spun nonwoven material according to claim 1, characterized in that, The first meltblown fiber web layer and the second meltblown fiber web layer adopt a meltblown fiber web structure.

3. The low-pile twin-spun nonwoven material according to claim 1 or 2, characterized in that, The meltblown fiber is one or more of PP fiber, PLA fiber or PHA fiber.

4. The low-pile twin-spun nonwoven material according to claim 1, characterized in that, The meltblown fiber is a mixture of polypropylene and hydrophilic masterbatch.

5. The low-pile twin-spun nonwoven material according to claim 4, characterized in that, The meltblown fiber contains 50-70 parts by weight of polypropylene and 1-3 parts by weight of hydrophilic masterbatch.

6. The low-pile twin-spun nonwoven material according to claim 1, characterized in that, The thickness of the first meltblown fiber web layer is less than the thickness of the first composite fiber web layer, and the thickness of the second meltblown fiber web layer is less than the thickness of the second composite fiber web layer.

7. The low-pile twin-spun nonwoven material according to claim 1, characterized in that, In the first composite fiber web layer and the second composite fiber web layer, the ratio of wood pulp fiber to meltblown fiber is 1:1.5~2.

8. A method for preparing a low-pile twin-spun nonwoven material, used for preparing any one of the low-pile twin-spun nonwoven materials according to claims 1 to 7, characterized in that, Includes the following steps: S1. Forming of the second meltblown fiber mesh layer: The meltblown fiber raw material is fed into the first screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the first spinneret. Under the stretching action of the high temperature and high speed airflow, the first meltblown fiber stream is formed and deposited on the condensing screen of the web forming machine to form the second meltblown fiber web layer. S2. Forming of the second composite fiber web layer: The raw material for meltblown fiber is fed into the second screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the second spinneret and formed into a second meltblown fiber stream under the stretching action of high temperature and high speed airflow. Simultaneously, wood pulp fibers are blown into the second meltblown fiber stream through an air conveying device for mixing and synchronous deposition on the second meltblown fiber web to form a second composite fiber web. S3. Forming of the airflow fiber web layer: After the wood pulp fibers are combed into single fibers, compressed air is used to send the wood pulp fibers to the airflow forming nozzle to form an airflow fiber web layer above the second composite fiber web layer. S4. Forming of the first composite fiber web layer: The raw material for meltblown fiber is fed into the third screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the third spinneret and formed into a third meltblown fiber stream under the stretching action of high temperature and high speed airflow. Wood pulp fibers are blown into the third meltblown fiber stream through an airflow conveying device, mixed, and simultaneously deposited on the airflow fiber web to form the first composite fiber web. S5. Forming of the first meltblown fiber mesh layer: The meltblown fiber raw material is fed into the fourth screw extruder, heated and melted to about 190~230°C to form a melt, which is then extruded through the fourth spinneret. Under the stretching action of the high temperature and high speed airflow, the fourth meltblown fiber flow is formed and deposited on the first composite fiber web layer to form the first meltblown fiber web layer. S6. Hot rolling treatment: Embossing is performed using hot-rolled embossing rollers to obtain low-pile twin-spun nonwoven materials.

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