Multi-layer composite absorption core non-woven fabric

Abstract

The utility model belongs to the field of non-woven fabrics, and discloses a multi-layer composite absorption core non-woven fabric. The multi-layer composite absorption core non-woven fabric is composed of a flow guide face layer, a water absorption layer A, a permeation layer A, a permeation layer B, a water absorption layer B and a superfine fiber bottom layer. The flow guide surface layer is arranged on the top layer, the superfine fiber bottom layer is arranged on the bottom layer, and the flow guide surface layer, the water absorption layer A, the permeation layer A, the permeation layer B, the water absorption layer B and the superfine fiber bottom layer are sequentially laid from top to bottom; the top surface of the flow guide surface layer is a concave-convex structural surface, and the concave area accounts for 1-10 of the whole area of the surface horizontal plane; the water absorption layer A is in cross-linked connection with the permeable layer A, and the permeable layer B is in cross-linked connection with the water absorption layer B. The fabric is good in liquid absorption, light, thin, free of reverse osmosis and high in strength.

Description

Technical Field

[0001] This utility model belongs to the field of nonwoven fabrics, and relates to a multilayer composite absorbent core nonwoven fabric. Background Technology

[0002] The market offers a wide variety of disposable diapers, but they are mainly composed of four parts: a skin-friendly surface layer, a distribution layer, an absorbent core, and a back layer. Among these, the absorbent core is the most important structural component of the diaper. As the main absorbent layer, it is required to quickly absorb urine and use distribution and wicking effects to rapidly diffuse the urine throughout the entire absorbent core. Then, superabsorbent polymer (SAP) resin quickly absorbs and locks in the urine, preventing backflow.

[0003] Currently, the core materials on the market are mainly household paper-coated fluff pulp and SAP. Although they have good absorbency, they are uncomfortable to wear after being made into diapers, prone to backflow, and the non-woven fabric of the core has low strength and is easily damaged. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a multi-layer composite absorbent core nonwoven fabric that can be used as the core of a diaper. It has the characteristics of good liquid absorption, thinness, no backflow, and high strength.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a multi-layer composite absorbent core nonwoven fabric, which is composed of a flow guiding surface layer, a water-absorbing layer A, a permeable layer A, a permeable layer B, a water-absorbing layer B, and a microfiber bottom layer; the flow guiding surface layer is set on the top layer, and the microfiber bottom layer is set on the bottom layer, and the flow guiding surface layer, water-absorbing layer A, permeable layer A, permeable layer B, water-absorbing layer B, and microfiber bottom layer are laid in sequence from top to bottom; the top surface of the flow guiding surface layer has a concave-convex structure, and its concave area accounts for 1-10% of the total area of ​​the horizontal surface; the water-absorbing layer A is cross-linked with the permeable layer A, and the permeable layer B is cross-linked with the water-absorbing layer B.

[0006] The flow guiding surface layer is composed of an ultra-fine fiber layer A and an ultra-fine fiber layer B arranged sequentially from top to bottom; wherein the fibers of ultra-fine fiber layer A and ultra-fine fiber layer B are interleaved and connected. The fiber fineness of ultra-fine fiber layer A is 1-5 micrometers, and the fiber fineness of ultra-fine fiber layer B is 20-50 micrometers.

[0007] Furthermore, the wood pulp fibers in the absorbent layer A are cross-linked with the permeable layer A.

[0008] Furthermore, the wood pulp fibers in the permeable layer B are cross-linked with those in the absorbent layer B.

[0009] Furthermore, the absorbent layer A comprises a liquid-absorbing layer and a fiber web layer, arranged sequentially from top to bottom; the liquid-absorbing layer is uniformly dispersed within the fiber web layer; the fiber web layer is made of wood pulp fiber, which is any one or a mixture of two or more of softwood and hardwood pulp and bamboo fiber pulp. The liquid-absorbing layer is made of SAP superabsorbent polymer, a commercially available superabsorbent polymer.

[0010] The absorbent layer is also equipped with deodorizing masterbatch, which is evenly dispersed in the fiber mesh layer.

[0011] The main component of the deodorizing masterbatch is silicate molecular sieve, in powder form, 100-500 nanometers in size. Its structure contains numerous uniformly sized pores with a diameter of 3.84-12.8 μm and a silica-to-alumina ratio of 20-50 mol / mol. The deodorizing masterbatch is a commercially available product.

[0012] Furthermore, it is preferable that SAP and deodorizing masterbatch are uniformly dispersed in wood pulp fibers.

[0013] Furthermore, the absorbent layer A has the same structure as the absorbent layer B.

[0014] Furthermore, the raw material for the permeation layer A is polypropylene, which is produced by melt-blown permeation layer A through melt spinning.

[0015] Furthermore, the raw material for the permeation layer B is polypropylene, which is either a melt-blown permeation layer B made by melt spinning or a melt-blown permeation layer B made by melt spinning.

[0016] Furthermore, the fiber fineness of the microfiber substrate is 1-10 micrometers; the raw material of the microfiber substrate is polypropylene, which is a meltblown microfiber substrate made of polypropylene through meltblown spinning.

[0017] Furthermore, the basis weight of the flow-guiding layer is 3-20 gsm; the basis weight of the absorbent layer A is 10-50 gsm; the basis weight of the permeable layer A is 3-15 gsm; the basis weight of the permeable layer B is 3-15 gsm; the basis weight of the absorbent layer B is 10-50 gsm; and the basis weight of the bottom ultrafine fiber layer is 3-20 gsm.

[0018] The advantages of this utility model compared with the prior art are:

[0019] Compared with existing absorbent core nonwoven fabrics on the market, the multi-layer composite absorbent core nonwoven fabric provided by this utility model is a multi-layer structure nonwoven fabric. Its flow-guiding surface layer has a flow-guiding and permeation effect, and the middle water-absorbing and permeation layer can better absorb liquid and disperse it, making it less prone to clumping and backflow. Moreover, it has high overall strength and is easy to process. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of a multi-layer composite absorbent core nonwoven fabric structure according to this utility model.

[0022] In the diagram: 1. Flow guiding layer, 2. Water absorption layer A, 3. Permeable layer A, 4. Permeable layer B, 5. Water absorption layer B, 6. Bottom ultrafine fiber layer. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0024] Example 1

[0025] A multi-layer composite absorbent core nonwoven fabric, such as Figure 1 As shown, a multi-layer composite absorbent core nonwoven fabric is provided, which consists of a flow-guiding surface layer 1, a water-absorbing layer A2, a permeable layer A3, a permeable layer B4, a water-absorbing layer B5, and a microfiber bottom layer 6. The flow-guiding surface layer 1 is placed on the top layer, and the microfiber bottom layer 6 is placed on the bottom layer. The flow-guiding surface layer 1, water-absorbing layer A2, permeable layer A3, permeable layer B4, water-absorbing layer B5, and microfiber bottom layer 6 are laid in sequence from top to bottom. The top surface of the flow-guiding surface layer 1 has a concave-convex structure, and its concave area accounts for 1-10% of the total area of ​​the horizontal surface. The water-absorbing layer A2 is cross-linked with the permeable layer A3, and the permeable layer B4 is cross-linked with the water-absorbing layer B5.

[0026] The flow guiding surface layer 1 is composed of ultra-fine fiber layer A and ultra-fine fiber layer B arranged in a top-to-bottom order; wherein the fibers of ultra-fine fiber layer A and ultra-fine fiber layer B are interlocked and connected.

[0027] The wood pulp fibers in the absorbent layer A2 are cross-linked with the permeable layer A3.

[0028] The wood pulp fibers in the permeable layer B4 and the absorbent layer B5 are cross-linked.

[0029] Product specifications: 100g.

[0030] Flow guiding layer 1: Polypropylene is produced into a 5g meltblown layer by melt spinning.

[0031] Absorbent Layer A2: Bamboo pulp board is dispersed into fibers after being crushed by a crusher, and then spun into a web by airflow onto the permeation layer A3. The weight of the pulp is set at 25g. SAP and deodorizing masterbatch are blended and evenly sprayed into the pulp fiber web layer. The weight of SAP is set at 15g.

[0032] The permeation layer A3 is a 5g meltblown layer made of polypropylene through melt spinning.

[0033] The permeation layer B4 is a 5g meltblown layer made of polypropylene through melt spinning.

[0034] The absorbent layer B5 is made of bamboo fiber pulp, which is dispersed into fibers by a crusher and then spun into a web by an airflow onto the permeation layer B4. The weight of the fiber pulp is set at 25g. SAP and deodorizing masterbatch are blended together and evenly sprayed into the fiber web of the fiber pulp. The weight of SAP is set at 15g.

[0035] Bottom microfiber layer 6: Polypropylene is produced as a 5g meltblown layer by melt spinning.

[0036] These six layers are laid sequentially on the mesh curtain and then hot-rolled and solidified by a hot rolling mill.

[0037] After passing through a hot rolling mill, the patterned steel is pressed together by patterned rolls and plain rolls. The contact area between the patterned steel and the plain rolls melts and solidifies, forming concave points.

[0038] Example 2

[0039] The fiber fineness of ultrafine fiber layer A is 1 micrometer, and the fiber fineness of ultrafine fiber layer B is 20 micrometers. Other aspects are the same as in Example 1.

[0040] Example 3

[0041] The fiber fineness of ultrafine fiber layer A is 5 micrometers, and the fiber fineness of ultrafine fiber layer B is 20 micrometers. Other aspects are the same as in Example 1.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A multi-layer composite absorbent core nonwoven fabric, characterized by, The multi-layer composite absorbent core non-woven fabric is composed of a flow guide surface layer (1), a water absorbing layer A (2), a permeable layer A (3), a permeable layer B (4), a water absorbing layer B (5), and a superfine fiber bottom layer (6); the flow guide surface layer (1) is arranged at the top layer, the superfine fiber bottom layer (6) is arranged at the bottom layer, and the flow guide surface layer (1), the water absorbing layer A (2), the permeable layer A (3), the permeable layer B (4), the water absorbing layer B (5), and the superfine fiber bottom layer (6) are sequentially arranged from top to bottom; the top surface of the flow guide surface layer (1) is a concave-convex structure surface, and the concave area accounts for 1-10% of the overall area of the surface horizontal plane; the water absorbing layer A (2) is cross-linked with the permeable layer A (3), and the permeable layer B (4) is cross-linked with the water absorbing layer B (5).

2. A multi-layered composite absorbent core nonwoven fabric according to claim 1, wherein the first and second nonwoven fabrics are each a spunbond fabric. The flow guide surface layer (1) is composed of a superfine fiber layer A and a superfine fiber layer B arranged sequentially from top to bottom; wherein the superfine fiber layer A and the superfine fiber layer B are cross-lapped and connected.

3. A multi-layered composite absorbent core nonwoven fabric according to claim 1, wherein the absorbent core nonwoven fabric is characterized by, The wood pulp fibers in the water absorbing layer A (2) are cross-linked with the permeable layer A (3).

4. The multilayer composite absorbent core nonwoven fabric as described in claim 1, characterized in that, The wood pulp fibers in the permeable layer B (4) are cross-linked with the water absorbing layer B (5).

5. The multi-layered composite absorbent core nonwoven fabric according to claim 1, wherein the absorbent core is a fibrous web having a basis weight of 50 to 300 g / m2. The water absorbing layer A (2) is composed of a liquid absorbing layer and a fiber web layer, and the liquid absorbing layer and the fiber web layer are arranged sequentially from top to bottom; the liquid absorbing layer is uniformly dispersed in the fiber web layer.

6. A multi-layered composite absorbent core nonwoven fabric according to claim 1, wherein the absorbent core is a fibrous web having a basis weight of 50 to 300 g / m2. The water absorbing layer A (2) and the water absorbing layer B (5) have the same structure.

7. A multi-layered composite absorbent core nonwoven fabric according to claim 1, wherein the absorbent core is a fibrous web having a basis weight of 50 to 300 g / m2. The fiber fineness of the superfine fiber layer A is 1-5 microns, and the fiber fineness of the superfine fiber layer B is 20-50 microns.

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