Absorptive fiber material with double hydrophilic gradient differences and preparation method thereof

Abstract

An absorptive fiber material with double hydrophilic gradient differences comprises an upper layer surface layer and a lower layer surface layer which are mutually compounded up and down, the upper layer surface layer comprises a carding fiber layer and side fiber layers arranged on the left side and the right side of the carding fiber layer, and the lower layer surface layer comprises an upper layer surface layer and a lower layer surface layer which are mutually compounded up and down. The hydrophilic angle of the carding fiber layer is larger than that of the side fiber layer, and the hydrophilic angle of the side fiber layer is larger than that of the lower surface layer. A method for preparing the fiber material comprises the following steps: S1, coating the non-woven fabric material of the upper surface layer with an oiling agent with a certain width at equal intervals in the transverse direction, and S2, slitting the non-woven fabric material obtained in the step S1 at the center of each side fiber layer. According to the double-hydrophilic gradient difference surface layer, dryness is kept, meanwhile, slippage and seepage of liquid are reduced, hydrophilic gradients are also formed on the two sides of the CD direction of the upper layer of the surface layer and the fibers in the middle of the surface layer, so that the double-hydrophilic gradient difference surface layer is formed, liquid flowing to the two sides is subjected to the hydrophilic gradient effect, slippage and seepage of the two sides of the liquid are avoided, and the probability of side leakage of the liquid is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of daily necessities, and in particular to an absorbent fiber material with a double hydrophilic gradient difference and a preparation method thereof. Background Art

[0002] The top sheet of sanitary products generally uses soft hot air fiber non-woven fabrics, but hot air non-woven fabrics are relatively fluffy and have many gaps, which are easy to store water, which can easily cause poor dryness of the surface layer and easy moisture to cause red buttocks or other skin diseases. Some companies will emboss the hot air non-woven fabrics to form 3D embossing to reduce the contact area with the skin, but it is still not dry enough. On this basis, other companies will design the hydrophilicity of the upper and lower layers for the hot air non-woven fabric surface layer. The hydrophilicity of the upper layer of the surface layer is less than that of the lower layer of the surface layer, thereby forming a hydrophilic gradient in the thickness direction, and the liquid is more likely to penetrate downward, thereby reducing the hydrophilicity of the top layer of the surface layer and improving the dryness of the product. However, in this case, because the hydrophilicity of the top layer decreases, the liquid is easy to slide to both sides, which may cause leakage on both sides. Therefore, it is hoped that the leakage caused by sliding can be reduced while ensuring dryness.

[0003] In the prior art, the hydrophilic gradient surface layer in the thickness direction has a low hydrophilicity on the top layer, which can ensure dryness, but is prone to liquid slippage and may cause leakage on both sides. If the hydrophilicity of the top layer is high, the dryness may be insufficient. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an absorbent fiber material with a double hydrophilic gradient difference, which forms a transverse hydrophilic gradient on both sides of the upper surface layer in the CD direction, and simultaneously forms a longitudinal hydrophilic gradient on the upper surface layer and the lower surface layer, and can prevent liquid from slipping on both sides, and a preparation method thereof. In order to solve the above technical problems, the present invention provides the following technical solutions: An absorbent fiber material with a double hydrophilic gradient difference, the material comprising an upper surface layer and a lower surface layer which are composited with each other, the upper surface layer comprising a combed fiber layer and side fiber layers arranged on the left and right sides of the combed fiber layer, the hydrophilic angle of the combed fiber layer is greater than the hydrophilic angle of the side fiber layer, and the hydrophilic angle of the side fiber layer is greater than the hydrophilic angle of the lower surface layer.

[0005] On the basis of adopting the above technical solution, the present invention can also adopt the following further technical solution: The lower surface of the lower surface layer is further compounded with a core body, and the hydrophilic angle of the fiber layer of the core body close to the surface layer is smaller than the hydrophilic angle of the lower surface layer.

[0006] The upper surface layer is processed by an embossing process, and the embossing density of the side fiber layer is not less than the embossing density of the combed fiber layer.

[0007] Furthermore, the present invention also provides the following technical solutions: A method for preparing the fiber material as described above comprises the following steps: S1, coating the non-woven fabric material of the upper layer with an oil agent of a certain width at equal intervals in the horizontal direction, so that the area not coated with the oil agent is the combed fiber layer, and the area coated with the oil agent is the side fiber layer; S2, cutting the non-woven fabric material obtained in step S1 at the center of each side fiber layer to obtain a plurality of upper surface layer material units.

[0008] The oil coating width in step S1 is 10-60 mm.

[0009] The non-woven fabric material of the upper surface layer is hot air non-woven fabric or hot rolled non-woven fabric, and the gram weight of the non-woven fabric material of the upper surface layer is 12-30 gsm.

[0010] The hydrophilicity of the upper surface layer is weakly hydrophobic or weakly hydrophilic.

[0011] The following steps are also included: S11, pressing the lower surface layer material onto the lower surface of the upper surface layer material; S12, pressing the lower surface of the material obtained in step S11 with the core material; The step S11 and the step S12 are performed after the step S2, or the step S11 and the step S12 are performed between the step S1 and the step S2.

[0012] The lower surface layer material is a non-woven fabric material, which is a hot air non-woven fabric or a hot rolled non-woven fabric, and the gram weight of the non-woven fabric material of the lower surface layer is 12-30 gsm.

[0013] The nonwoven fabric of the upper surface layer is a double-combed nonwoven fabric.

[0014] Compared with the prior art, the present invention can achieve the following beneficial effects: The present invention reduces the slippage of liquid while keeping it dry. The fibers on both sides of the upper layer of the surface layer in the CD direction and in the middle of the surface layer also form a hydrophilic gradient, thereby forming a double hydrophilic gradient difference surface layer. When the liquid flows downward, the fibers in the lower layer of the surface layer absorb the moisture in the upper layer of the surface layer, thereby ensuring the dryness of the upper layer of the surface layer. The liquid flowing to the two sides is also affected by the hydrophilic gradient and absorbed by the fibers in the upper layer of the surface layer on both sides, thereby avoiding the slippage of liquid on both sides and reducing the probability of liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the upper surface of an absorbent fiber material with double hydrophilic gradient difference and a preparation method thereof according to the present invention.

[0016] Figure 2 This is a material cross-sectional view of an absorbent fiber material with a double hydrophilic gradient difference and a preparation method thereof according to the present invention.

[0017] Figure 3 The figure is a schematic diagram of the liquid flow of an absorbent fiber material with a double hydrophilic gradient difference and a preparation method thereof according to the present invention.

[0018] Figure 4 The present invention is a schematic diagram of the production and coating of an absorbent fiber material having a double hydrophilic gradient difference and a preparation method thereof.

[0019] Among them, there are an upper surface layer 1, a combed fiber layer 11, a side fiber layer 12, a lower surface layer 2, and a core body 3. DETAILED DESCRIPTION

[0020] In conjunction with the accompanying drawings, the absorbent fiber material with double hydrophilic gradient difference and the preparation method thereof provided by the present invention are further described.

[0021] In this embodiment, Figure 1-4 As shown, an absorbent fiber material with double hydrophilic gradient difference includes an upper surface layer 1, a lower surface layer 2 and a core 3 which are compounded with each other in sequence from top to bottom.

[0022] Among them, Figure 1 As shown, the upper surface layer 1 includes a combed fiber layer 11 and a side fiber layer 12 , and the side fiber layer 12 is arranged on the left and right sides of the combed fiber layer 11 .

[0023] Furthermore, the hydrophilic angle of the combed fiber layer 11 is θ1, the hydrophilic angle of the side fiber layer 12 is θ2, the hydrophilic angle of the lower surface layer 2 is θ3, and the hydrophilic angle of the fiber layer of the core body close to the surface layer is θ4, θ1>θ2>θ3>θ4. The smaller the hydrophilic angle, the stronger the hydrophilicity.

[0024] like Figure 2 As shown, the upper surface layer 1 is processed by embossing process, and the embossing density of the side fiber layer 12 is greater than the embossing density of the combed fiber layer 11. The embossing effect is drier, and denser embossing can block water, for example, denser embossing on the two sides can prevent side leakage.

[0025] The embossing process is further coordinated with the design of the hydrophilic angle to achieve that after the liquid flows down from the combed fiber layer 11 of the upper surface layer 1, the liquid in the combed fiber layer 11 flows toward the left and right side fiber layers 12 in the horizontal direction to form a first liquid flow direction, the liquid in the combed fiber layer 11 flows toward the lower surface layer 2 and the core 3 thereunder to form a second liquid flow direction, and the liquid in the side fiber layer 12 flows toward the lower surface layer 2 and the core 3 thereunder to form a third liquid flow direction.

[0026] like Figure 4 As shown, a method for preparing the fiber material as described above comprises the following steps: S1, coating the non-woven fabric material of the upper layer with an oil agent of 10-60 mm width at equal intervals in the horizontal direction, so that the area not coated with the oil agent is the combed fiber layer, and the area coated with the oil agent is the side fiber layer; S2, cutting the non-woven fabric material obtained in step S1 at the center of each side fiber layer to obtain a plurality of upper surface layer material units.

[0027] The non-woven fabric material of the upper surface layer 1 and the lower surface layer 2 is hot air non-woven fabric or hot rolled non-woven fabric, and the gram weight of the non-woven fabric material of the upper surface layer 1 and the lower surface layer 2 is 12-30 gsm.

[0028] Furthermore, the nonwoven fabric of the upper layer 1 may also be a double-combed nonwoven fabric to further increase the hydrophilic gradient.

[0029] Furthermore, the hydrophilicity of the upper layer 1 is weakly hydrophobic or weakly hydrophilic.

[0030] A method for preparing the fiber material as described above further comprises the following steps: S11, pressing the lower surface layer material onto the lower surface of the upper surface layer material; S12, pressing the lower surface of the material obtained in step S11 with the core material; Step S11 and step S12 are performed after step S2, or step S11 and step S12 are performed between step S1 and step S2.

[0031] The present invention has been shown and described with reference to the preferred embodiments, but it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. An absorbent fiber material having a double hydrophilic gradient difference, characterized in that The material includes an upper surface layer and a lower surface layer which are compounded with each other. The upper surface layer includes a combed fiber layer and side fiber layers arranged on the left and right sides of the combed fiber layer. The hydrophilic angle of the combed fiber layer is greater than the hydrophilic angle of the side fiber layer, and the hydrophilic angle of the side fiber layer is greater than the hydrophilic angle of the lower surface layer.

2. The absorbent fiber material having a double hydrophilic gradient difference according to claim 1, characterized in that The lower surface of the lower surface layer is further compounded with a core body, and the hydrophilic angle of the fiber layer of the core body close to the surface layer side is smaller than the hydrophilic angle of the lower surface layer.

3. The absorbent fiber material having a double hydrophilic gradient difference according to claim 1, characterized in that The upper surface layer is processed by an embossing process, and the embossing density of the side fiber layer is not less than the embossing density of the combed fiber layer.

4. A method for preparing a fiber material as claimed in any one of claims 1 to 3, characterized in that The following steps are involved: S1, coating the non-woven fabric material of the upper layer with an oil agent of a certain width at equal intervals in the horizontal direction, so that the area not coated with the oil agent is the combed fiber layer, and the area coated with the oil agent is the side fiber layer; S2, cutting the non-woven fabric material obtained in step S1 at the center of each side fiber layer to obtain a plurality of upper surface layer material units.

5. The method for preparing an absorbent fiber material having a double hydrophilic gradient difference according to claim 4, characterized in that The oil coating width in step S1 is 10-60 mm.

6. The method for preparing an absorbent fiber material having a double hydrophilic gradient difference according to claim 4, characterized in that The non-woven fabric material of the upper surface layer is hot air non-woven fabric or hot rolled non-woven fabric, and the gram weight of the non-woven fabric material of the upper surface layer is 12-30 gsm.

7. The method for preparing an absorbent fiber material having a double hydrophilic gradient difference according to claim 4, characterized in that The hydrophilicity of the upper surface layer is weakly hydrophobic or weakly hydrophilic.

8. The method for preparing an absorbent fiber material having a double hydrophilic gradient difference according to claim 4, characterized in that The following steps are also included: S11, pressing the lower surface layer material onto the lower surface of the upper surface layer material; S12, pressing the lower surface of the material obtained in step S11 with the core material; The step S11 and the step S12 are performed after the step S2, or the step S11 and the step S12 are performed between the step S1 and the step S2.

9. The method for preparing an absorbent fiber material having a double hydrophilic gradient difference according to claim 4, characterized in that The lower surface layer material is a non-woven fabric material, which is a hot air non-woven fabric or a hot rolled non-woven fabric, and the gram weight of the non-woven fabric material of the lower surface layer is 12-30 gsm.

10. The method for preparing an absorbent fiber material having a double hydrophilic gradient difference according to claim 4, characterized in that The nonwoven fabric of the upper surface layer is a double-combed nonwoven fabric.

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