Lofty flow-directing two-component nonwoven fabric

Abstract

The utility model discloses a kind of fluffy flow guide double-component nonwoven fabrics, including nonwoven fabric layer and the hydrophilic oil layer coated in one side of nonwoven fabric layer, the nonwoven fabric layer includes first fiber web layer and second fiber web layer, the nonwoven fabric layer is coated by hydrophilic oil and the mechanical support between fiber layer, realize the synergistic optimization in the aspect of flow guide, touch, strength, specifically, the first fiber web layer and second fiber web layer are all used double-component fiber composition, wherein the fine denier staple fiber carding hot air forming process of second fiber web layer is fused and adhered to enhance fiber web strength, offset fine fiber weak point, the fine denier staple fiber mechanical insertion is formed three-dimensional anchoring in the gap between the thick denier long fiber, combined hot air bonding realizes strong interface bonding, relative to hot rolling process composite compression structure, the through hole and fluffy performance of the first fiber web layer are retained.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric technology, specifically to a fluffy, flow-guiding two-component nonwoven fabric. Background Technology

[0002] Non-woven fabrics are favored by consumers for their simple production process, large output, low cost, softness, and skin-friendly properties, and are used in disposable hygiene products.

[0003] The denier of the fibers that form nonwoven fabric has a great influence on the performance of nonwoven fabric. The smaller the denier, the smaller the fiber diameter, and the more delicate and smooth the nonwoven fabric feels. On the other hand, the larger the denier, the larger the fiber diameter, the more pores the nonwoven fabric has, which is conducive to air permeability and liquid absorption, and the more fluffy the nonwoven fabric is.

[0004] Low-denier fibers (≤1.5 denier) can give products a delicate touch and smooth surface, but they have problems such as difficulty in combing and poor uniformity of the fiber web, which restricts their large-scale application. Conventional denier fibers (1.5~3.0 denier) can balance processability and basic performance, but they are difficult to meet the high-end market's demand for extreme bulkiness and efficient flowability at the same time. In addition, in the existing fiber layer forming process, the hot pressing process will compress the pore structure of the fiber layer, which weakens the flow channels and liquid storage space of the coarse denier layer, affecting the bulkiness of the nonwoven fabric. Utility Model Content

[0005] To address the technical deficiencies in the background technology, this utility model proposes a fluffy, flow-guiding two-component nonwoven fabric, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0006] A fluffy, flow-guiding bicomponent nonwoven fabric includes a nonwoven fabric layer and a hydrophilic oil layer coated on one side of the nonwoven fabric layer. The nonwoven fabric layer includes a first fiber web layer and a second fiber web layer. The nonwoven fabric layer has micropores that pass through the second fiber web layer toward the first fiber web layer. The first fiber web layer is composed of a plurality of coarse denier long fibers combed and arranged, and the second fiber web layer is composed of a plurality of fine denier short fibers combed and arranged. Both the coarse denier long fibers and the fine denier short fibers are bicomponent fibers consisting of a sheath layer and a core layer.

[0007] As an improvement to the above scheme, the first fiber web is composed of several coarse denier long fibers with a denier of 6.0-10.0 denier arranged in an alternating pattern, with pores formed between adjacent coarse denier long fibers.

[0008] As an improvement to the above scheme, the second fiber web is composed of several fine denier short fibers with a denier of 1.5-2.0 denier arranged in an alternating pattern, with the ends of the fine denier short fibers passing between two adjacent coarse denier long fibers.

[0009] As an improvement to the above solution, the coarse denier long fiber includes a first core layer consisting of at least one fiber and a first sheath layer covering the outer surface of the first core layer, wherein the melting point of the first sheath layer is lower than the melting point of the first core layer.

[0010] As an improvement to the above scheme, the fine denier short fiber includes a second core layer consisting of at least one fiber and a second sheath layer covering the outer surface of the second core layer, wherein the melting point of the second sheath layer is lower than the melting point of the second core layer.

[0011] As an improvement to the above scheme, the coarse denier long fibers in the first fiber web layer and the fine denier short fibers in the second fiber web layer form several bonding points at the intersection after combing.

[0012] As an improvement to the above scheme, the fiber arrangement in the first core layer is one of the following: parallel, island, or orange segment type.

[0013] As an improvement to the above scheme, the fiber arrangement in the second core layer is one of the following: parallel, island, or orange segment type.

[0014] The beneficial effects of this utility model are as follows:

[0015] The nonwoven fabric layer achieves synergistic optimization in terms of flowability, tactile feel, and strength through hydrophilic oil coating and mechanical support between fiber layers. Specifically, both the first and second fiber web layers are composed of bicomponent fibers. During the hot air forming process of the fine denier short fibers in the second fiber web layer, the skin layer melts and bonds to enhance the strength of the fiber web and offset the weakness of the fine fibers. The fine denier short fibers are mechanically interwoven in the gaps between the coarse denier long fibers to form a three-dimensional anchor. Combined with hot air bonding, a strong interface bond is achieved. Compared with the hot rolling process composite compression structure, the through-pores and fluffy properties of the first fiber web layer are retained. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the nonwoven fabric layer thickness direction structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the fine denier short fiber of this utility model bent toward the first fiber layer.

[0018] Figure 3 This is a schematic diagram of the first fiber mesh layer structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the end face structure of the fine denier short fiber of this utility model.

[0020] Figure 5 This is a schematic diagram of the end face structure of the coarse denier short fiber of this utility model.

[0021] Among them: first fiber web layer 1, coarse denier long fiber 11, first skin layer 12, first core layer 13, second fiber web layer 2, fine denier short fiber 21, second skin layer 22, second core layer 23, hydrophilic oil agent layer 3, micropores 4, and bonding point 5. Detailed Implementation

[0022] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0023] A fluffy, flow-guiding bicomponent nonwoven fabric includes a nonwoven fabric layer and a hydrophilic oil layer 3 coated on one side of the nonwoven fabric layer. The nonwoven fabric layer includes a first fiber web layer 1 and a second fiber web layer 2. The nonwoven fabric layer is provided with micropores 4 that pass through the second fiber web layer 2 toward the first fiber web layer 1. The first fiber web layer 1 is composed of a plurality of coarse denier long fibers 11 combed and arranged, and the second fiber web layer 2 is composed of a plurality of fine denier short fibers 21 combed and arranged. Both the coarse denier long fibers 11 and the fine denier short fibers 21 are bicomponent fibers consisting of a sheath layer and a core layer.

[0024] In the technical solution of the nonwoven fabric layer of this utility model, the nonwoven fabric layer is composed of a first fiber web layer 1, a second fiber web layer 2 and a hydrophilic oil agent layer 3, wherein the first fiber web layer 1 is composed of coarse denier long fibers 11 and the second fiber web layer 2 is composed of fine denier short fibers 21. After carding and compounding, some of the fine denier short fibers 21 in the second fiber web layer 2 are inserted into the gaps of the coarse denier short fibers through micropores 4, forming a conical three-dimensional support structure in the thickness direction of the nonwoven fabric layer;

[0025] It should be noted that the coarse denier long fibers 11 are combed to form a first fiber web layer 1 with cross-arranged fibers, and the fine denier short fibers 21 are combed to form a second fiber web layer 2 with cross-arranged fibers. Generally speaking, this combing technology is layered combing. After combing, a second fiber web layer 2 and a first fiber web layer 1 are formed stacked on top of each other in the web forming area. After being treated with micropores 4 and hot air, some fiber ends of the upper second fiber web layer 2 penetrate downward into the first fiber web layer 1. After being fixed by hot air, a stable interlayer fixed structure is formed.

[0026] In the technical solution of the first fiber web layer 1 of this utility model, the first fiber web layer 1 is composed of several coarse denier long fibers 11 with a denier of 6.0-10 denier arranged in an alternating manner, and pores are formed between two adjacent coarse denier long fibers 11. Generally speaking, the coarse denier long fibers 11 have a large diameter, form relatively large pores, and have a looser structure. In the first fiber web layer 1 after being combed into a web, sufficient space is provided for the insertion of fine denier short fibers 21.

[0027] In the technical solution of the second fiber web layer 2 of this utility model, the second fiber web layer 2 is composed of a number of fine denier short fibers 21 with a denier of 1.5-2.0 denier arranged in an alternating manner. The ends of the fine denier short fibers 21 are inserted between two adjacent coarse denier long fibers 11. Generally speaking, the fine denier short fibers 21 have a small diameter and relatively low stiffness. Especially in the hot air bonding process, after the fine denier short fibers 21 are softened by heat, they are more easily hooked, bent and deformed by needles, thereby penetrating into the second fiber web layer 2 below.

[0028] Furthermore, in the above scheme, the coarse denier long fiber 11 includes a first core layer 13 composed of at least one fiber and a first sheath layer 12 covering the outer surface of the first core layer 13, wherein the melting point of the first sheath layer 12 is lower than the melting point of the first core layer 13. The fine denier short fiber 21 includes a second core layer 23 composed of at least one fiber and a second sheath layer 22 covering the outer surface of the second core layer 23, wherein the melting point of the second sheath layer 22 is lower than the melting point of the second core layer 23.

[0029] It should be noted that the first core layer 13 is a coarse denier PET core layer, the first skin layer 12 is a coarse denier PE skin layer, the second core layer 23 is a fine denier PET core layer, and the second skin layer 22 is a fine denier COPET skin layer.

[0030] The coarse denier PET core layer and the fine denier PET core layer have matching heat shrinkage rates, which can effectively prevent warping and provide good rigid support for the nonwoven fabric layer. The thickness of the coarse denier PE skin layer is 0.5-1.0 μm, and the thickness of the fine denier COPET skin layer is 0.3-0.8 μm. The melting point of the coarse denier PE skin layer and the fine denier COPET skin layer is at least 40°C lower than the melting point of the core layer.

[0031] Furthermore, in the above scheme, after combing, the coarse denier long fibers 11 in the first fiber web layer 1 and the fine denier short fibers 21 in the second fiber web layer 2 form several bonding points 5 at the intersection. The fine denier COPET skin layer and the coarse denier PE skin layer form micro-melting bonding points under the hot air process, which reduces free end hairs and effectively avoids the situation where PE to PE bonding causes the interface to melt completely, resulting in the loss of the bulkiness of the nonwoven fabric layer.

[0032] Furthermore, in the above scheme, the fiber arrangement in the first core layer 13 is one of the following: parallel, island, or orange segment type.

[0033] Furthermore, in the above scheme, the fiber arrangement in the second core layer 23 is one of the following: parallel, island, or orange segment type.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fluffy, flow-guiding bicomponent nonwoven fabric, characterized in that, The nonwoven fabric includes a nonwoven fabric layer and a hydrophilic oil layer (3) coated on one side of the nonwoven fabric layer. The nonwoven fabric layer includes a first fiber web layer (1) and a second fiber web layer (2). The nonwoven fabric layer is provided with micropores (4) that pass through the second fiber web layer (2) toward the first fiber web layer (1). The first fiber web layer (1) is composed of a number of coarse denier long fibers (11) combed together. The second fiber web layer (2) is composed of a number of fine denier short fibers (21) combed together. The coarse denier long fibers (11) and the fine denier short fibers (21) are both bicomponent fibers consisting of a sheath and a core layer.

2. The fluffy, flow-guiding bicomponent nonwoven fabric according to claim 1, characterized in that, The first fiber web (1) is composed of several coarse denier long fibers (11) with a denier of 6.0-10.0 denier arranged in an alternating manner, and pores are formed between two adjacent coarse denier long fibers (11).

3. The fluffy, flow-guiding bicomponent nonwoven fabric according to claim 1, characterized in that, The second fiber web (2) is composed of several fine denier short fibers (21) with a denier of 1.5-2.0 denier arranged in an alternating pattern, with the ends of the fine denier short fibers (21) passing between two adjacent coarse denier long fibers (11).

4. The fluffy, flow-guiding bicomponent nonwoven fabric according to claim 1, characterized in that, The coarse denier long fiber (11) includes a first core layer (13) consisting of at least one fiber and a first sheath layer (12) covering the outer surface of the first core layer (13), wherein the melting point of the first sheath layer (12) is lower than the melting point of the first core layer (13).

5. The fluffy, flow-guiding bicomponent nonwoven fabric according to claim 1, characterized in that, The fine denier short fiber (21) includes a second core layer (23) consisting of at least one fiber and a second sheath layer (22) covering the outer surface of the second core layer (23), wherein the melting point of the second sheath layer (22) is lower than the melting point of the second core layer (23).

6. The fluffy, flow-guiding bicomponent nonwoven fabric according to claim 1, characterized in that, After being combed, the coarse denier long fibers (11) in the first fiber web layer (1) and the fine denier short fibers (21) in the second fiber web layer (2) form several bonding points (5) at the intersection.

7. The fluffy, flow-guiding bicomponent nonwoven fabric according to claim 4, characterized in that, The fiber arrangement in the first core layer (13) is one of the following: parallel, island, and orange segment.

8. The fluffy, flow-guiding bicomponent nonwoven fabric according to claim 5, characterized in that, The fiber arrangement in the second core layer (23) is one of the following: parallel, island, and orange segment.

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